Fix mastering presets syntax error and add preset description updates

backend/services/mastering_service.py

@@ -1,666 +1,661 @@
-"""
-Audio mastering service with industry-standard presets using Pedalboard
-"""
-import os
-import logging
-import numpy as np
-from pathlib import Path
-from typing import Dict, List, Optional
-import soundfile as sf
-from pedalboard import (
-    Pedalboard, 
-    Compressor, 
-    Limiter, 
-    Gain,
-    HighpassFilter,
-    LowpassFilter,
-    PeakFilter,
-    LowShelfFilter,
-    HighShelfFilter,
-    Reverb,
-    Chorus,
-    Delay
-)
-
-logger = logging.getLogger(__name__)
-
-class MasteringPreset:
-    """Mastering preset configuration"""
-    
-    def __init__(self, name: str, description: str, chain: List):
-        self.name = name
-        self.description = description
-        self.chain = chain
-
-class MasteringService:
-    """Audio mastering and EQ service"""
-    
-    # Industry-standard mastering presets
-    PRESETS = {
-        # Clean/Transparent Presets
-        "clean_master": MasteringPreset(
-            "Clean Master",
-            "Transparent mastering with gentle compression",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                PeakFilter(cutoff_frequency_hz=100, gain_db=-1, q=0.7),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=0.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
-                Compressor(threshold_db=-12, ratio=2.0, attack_ms=5, release_ms=100),
-                Limiter(threshold_db=-1.0, release_ms=100)
-            ]
-        ),
-        
-        "subtle_warmth": MasteringPreset(
-            "Subtle Warmth",
-            "Gentle low-end enhancement with smooth highs",
-            [
-                HighpassFilter(cutoff_frequency_hz=25),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=200, gain_db=0.8, q=0.5),
-                PeakFilter(cutoff_frequency_hz=8000, gain_db=-0.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=1.0, q=0.7),
-                Compressor(threshold_db=-15, ratio=2.5, attack_ms=10, release_ms=150),
-                Limiter(threshold_db=-0.5, release_ms=100)
-            ]
-        ),
-        
-        # Pop/Commercial Presets
-        "modern_pop": MasteringPreset(
-            "Modern Pop",
-            "Radio-ready pop sound with punchy compression",
-            [
-                HighpassFilter(cutoff_frequency_hz=35),
-                PeakFilter(cutoff_frequency_hz=80, gain_db=-1.5, q=0.8),
-                LowShelfFilter(cutoff_frequency_hz=120, gain_db=2.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=2500, gain_db=1.5, q=1.2),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=0.7),
-                Compressor(threshold_db=-10, ratio=4.0, attack_ms=3, release_ms=80),
-                Limiter(threshold_db=-0.3, release_ms=50)
-            ]
-        ),
-        
-        "radio_ready": MasteringPreset(
-            "Radio Ready",
-            "Maximum loudness for commercial radio",
-            [
-                HighpassFilter(cutoff_frequency_hz=40),
-                PeakFilter(cutoff_frequency_hz=60, gain_db=-2.0, q=1.0),
-                LowShelfFilter(cutoff_frequency_hz=150, gain_db=1.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=2.0, q=1.5),
-                PeakFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.0, q=0.7),
-                Compressor(threshold_db=-8, ratio=6.0, attack_ms=2, release_ms=60),
-                Limiter(threshold_db=-0.1, release_ms=30)
-            ]
-        ),
-        
-        "punchy_commercial": MasteringPreset(
-            "Punchy Commercial",
-            "Aggressive punch for mainstream appeal",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                PeakFilter(cutoff_frequency_hz=100, gain_db=-2.0, q=1.2),
-                LowShelfFilter(cutoff_frequency_hz=200, gain_db=2.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=1000, gain_db=-1.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=4000, gain_db=2.5, q=1.5),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.8),
-                Compressor(threshold_db=-9, ratio=5.0, attack_ms=1, release_ms=50),
-                Limiter(threshold_db=-0.2, release_ms=40)
-            ]
-        ),
-        
-        # Rock/Alternative Presets
-        "rock_master": MasteringPreset(
-            "Rock Master",
-            "Powerful rock sound with emphasis on mids",
-            [
-                HighpassFilter(cutoff_frequency_hz=35),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=400, gain_db=1.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=2000, gain_db=2.0, q=1.2),
-                PeakFilter(cutoff_frequency_hz=5000, gain_db=1.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=1.0, q=0.8),
-                Compressor(threshold_db=-12, ratio=3.5, attack_ms=5, release_ms=120),
-                Limiter(threshold_db=-0.5, release_ms=80)
-            ]
-        ),
-        
-        "metal_aggressive": MasteringPreset(
-            "Metal Aggressive",
-            "Heavy, aggressive metal mastering",
-            [
-                HighpassFilter(cutoff_frequency_hz=40),
-                PeakFilter(cutoff_frequency_hz=80, gain_db=-1.5, q=1.0),
-                LowShelfFilter(cutoff_frequency_hz=150, gain_db=2.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=800, gain_db=-1.5, q=1.2),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=3.0, q=1.5),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=0.7),
-                Compressor(threshold_db=-8, ratio=6.0, attack_ms=1, release_ms=50),
-                Limiter(threshold_db=-0.1, release_ms=30)
-            ]
-        ),
-        
-        "indie_rock": MasteringPreset(
-            "Indie Rock",
-            "Lo-fi character with mid presence",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=120, gain_db=0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=1.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=2500, gain_db=2.0, q=1.2),
-                PeakFilter(cutoff_frequency_hz=7000, gain_db=-0.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=0.5, q=0.8),
-                Compressor(threshold_db=-14, ratio=3.0, attack_ms=8, release_ms=150),
-                Limiter(threshold_db=-0.8, release_ms=100)
-            ]
-        ),
-        
-        # Electronic/EDM Presets
-        "edm_club": MasteringPreset(
-            "EDM Club",
-            "Powerful club sound with deep bass",
-            [
-                HighpassFilter(cutoff_frequency_hz=25),
-                LowShelfFilter(cutoff_frequency_hz=80, gain_db=3.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=150, gain_db=2.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=1000, gain_db=-1.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=5000, gain_db=2.0, q=1.2),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.0, q=0.7),
-                Compressor(threshold_db=-6, ratio=8.0, attack_ms=0.5, release_ms=40),
-                Limiter(threshold_db=0.0, release_ms=20)
-            ]
-        ),
-        
-        "house_groovy": MasteringPreset(
-            "House Groovy",
-            "Smooth house music with rolling bass",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=250, gain_db=1.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=2000, gain_db=0.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.7),
-                Compressor(threshold_db=-10, ratio=4.0, attack_ms=2, release_ms=60),
-                Limiter(threshold_db=-0.2, release_ms=40)
-            ]
-        ),
-        
-        "techno_dark": MasteringPreset(
-            "Techno Dark",
-            "Dark, pounding techno master",
-            [
-                HighpassFilter(cutoff_frequency_hz=35),
-                PeakFilter(cutoff_frequency_hz=60, gain_db=2.0, q=1.0),
-                LowShelfFilter(cutoff_frequency_hz=120, gain_db=1.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=800, gain_db=-2.0, q=1.5),
-                PeakFilter(cutoff_frequency_hz=4000, gain_db=1.0, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=-0.5, q=0.8),
-                Compressor(threshold_db=-8, ratio=6.0, attack_ms=1, release_ms=50),
-                Limiter(threshold_db=-0.1, release_ms=30)
-            ]
-        ),
-        
-        "dubstep_heavy": MasteringPreset(
-            "Dubstep Heavy",
-            "Sub-bass focused with crispy highs",
-            [
-                HighpassFilter(cutoff_frequency_hz=20),
-                PeakFilter(cutoff_frequency_hz=50, gain_db=3.5, q=1.2),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=-2.0, q=1.5),
-                PeakFilter(cutoff_frequency_hz=6000, gain_db=2.5, q=1.2),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.5, q=0.7),
-                Compressor(threshold_db=-6, ratio=10.0, attack_ms=0.3, release_ms=30),
-                Limiter(threshold_db=0.0, release_ms=20)
-            ]
-        ),
-        
-        # Hip-Hop/R&B Presets
-        "hiphop_modern": MasteringPreset(
-            "Hip-Hop Modern",
-            "Contemporary hip-hop with deep bass",
-            [
-                HighpassFilter(cutoff_frequency_hz=25),
-                LowShelfFilter(cutoff_frequency_hz=80, gain_db=2.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=150, gain_db=1.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=1000, gain_db=-1.0, q=1.0),
-                PeakFilter(cutoff_frequency_hz=3500, gain_db=2.0, q=1.2),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.5, q=0.7),
-                Compressor(threshold_db=-10, ratio=4.0, attack_ms=5, release_ms=80),
-                Limiter(threshold_db=-0.3, release_ms=60)
-            ]
-        ),
-        
-        "trap_808": MasteringPreset(
-            "Trap 808",
-            "808-focused trap mastering",
-            [
-                HighpassFilter(cutoff_frequency_hz=20),
-                PeakFilter(cutoff_frequency_hz=50, gain_db=3.0, q=1.0),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=800, gain_db=-1.5, q=1.2),
-                PeakFilter(cutoff_frequency_hz=5000, gain_db=2.5, q=1.2),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=2.0, q=0.7),
-                Compressor(threshold_db=-8, ratio=5.0, attack_ms=3, release_ms=60),
-                Limiter(threshold_db=-0.2, release_ms=40)
-            ]
-        ),
-        
-        "rnb_smooth": MasteringPreset(
-            "R&B Smooth",
-            "Silky smooth R&B sound",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=300, gain_db=1.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=2000, gain_db=0.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=6000, gain_db=1.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.7),
-                Compressor(threshold_db=-12, ratio=3.0, attack_ms=8, release_ms=120),
-                Limiter(threshold_db=-0.5, release_ms=80)
-            ]
-        ),
-        
-        # Acoustic/Organic Presets
-        "acoustic_natural": MasteringPreset(
-            "Acoustic Natural",
-            "Natural, transparent acoustic sound",
-            [
-                HighpassFilter(cutoff_frequency_hz=25),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=0.8, q=0.8),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.0, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=0.7),
-                Compressor(threshold_db=-16, ratio=2.0, attack_ms=15, release_ms=200),
-                Limiter(threshold_db=-1.0, release_ms=120)
-            ]
-        ),
-        
-        "folk_warm": MasteringPreset(
-            "Folk Warm",
-            "Warm, intimate folk sound",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=150, gain_db=1.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=400, gain_db=1.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=2500, gain_db=1.0, q=1.0),
-                PeakFilter(cutoff_frequency_hz=7000, gain_db=-0.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.8),
-                Compressor(threshold_db=-18, ratio=2.5, attack_ms=20, release_ms=250),
-                Limiter(threshold_db=-1.5, release_ms=150)
-            ]
-        ),
-        
-        "jazz_vintage": MasteringPreset(
-            "Jazz Vintage",
-            "Classic jazz warmth and space",
-            [
-                HighpassFilter(cutoff_frequency_hz=35),
-                LowShelfFilter(cutoff_frequency_hz=120, gain_db=1.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=1.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=2000, gain_db=0.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=8000, gain_db=-1.0, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=0.5, q=0.8),
-                Compressor(threshold_db=-20, ratio=2.0, attack_ms=25, release_ms=300),
-                Limiter(threshold_db=-2.0, release_ms=180)
-            ]
-        ),
-        
-        # Classical/Orchestral Presets
-        "orchestral_wide": MasteringPreset(
-            "Orchestral Wide",
-            "Wide, natural orchestral sound",
-            [
-                HighpassFilter(cutoff_frequency_hz=20),
-                LowShelfFilter(cutoff_frequency_hz=80, gain_db=0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=300, gain_db=0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=4000, gain_db=0.8, q=0.8),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
-                Compressor(threshold_db=-24, ratio=1.5, attack_ms=30, release_ms=400),
-                Limiter(threshold_db=-3.0, release_ms=250)
-            ]
-        ),
-        
-        "classical_concert": MasteringPreset(
-            "Classical Concert",
-            "Concert hall ambience and dynamics",
-            [
-                HighpassFilter(cutoff_frequency_hz=25),
-                PeakFilter(cutoff_frequency_hz=200, gain_db=0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=1000, gain_db=0.3, q=0.8),
-                PeakFilter(cutoff_frequency_hz=6000, gain_db=0.8, q=0.8),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=0.5, q=0.7),
-                Compressor(threshold_db=-30, ratio=1.2, attack_ms=50, release_ms=500),
-                Limiter(threshold_db=-4.0, release_ms=300)
-            ]
-        ),
-        
-        # Ambient/Atmospheric Presets
-        "ambient_spacious": MasteringPreset(
-            "Ambient Spacious",
-            "Wide, spacious ambient master",
-            [
-                HighpassFilter(cutoff_frequency_hz=25),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=-0.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=0.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=0.7),
-                Compressor(threshold_db=-20, ratio=2.0, attack_ms=50, release_ms=400),
-                Limiter(threshold_db=-2.0, release_ms=200)
-            ]
-        ),
-        
-        "cinematic_epic": MasteringPreset(
-            "Cinematic Epic",
-            "Big, powerful cinematic sound",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=250, gain_db=1.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=2000, gain_db=1.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=6000, gain_db=2.0, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=0.7),
-                Compressor(threshold_db=-14, ratio=3.0, attack_ms=10, release_ms=150),
-                Limiter(threshold_db=-0.5, release_ms=100)
-            ]
-        ),
-        
-        # Vintage/Lo-Fi Presets
-        "lofi_chill": MasteringPreset(
-            "Lo-Fi Chill",
-            "Vintage lo-fi character",
-            [
-                HighpassFilter(cutoff_frequency_hz=50),
-                LowpassFilter(cutoff_frequency_hz=10000),
-                LowShelfFilter(cutoff_frequency_hz=150, gain_db=1.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=800, gain_db=-1.0, q=1.2),
-                PeakFilter(cutoff_frequency_hz=4000, gain_db=-1.5, q=1.0),
-                Compressor(threshold_db=-12, ratio=3.0, attack_ms=15, release_ms=180),
-                Limiter(threshold_db=-1.0, release_ms=120)
-            ]
-        ),
-        
-        "vintage_vinyl": MasteringPreset(
-            "Vintage Vinyl",
-            "Classic vinyl record warmth",
-            [
-                HighpassFilter(cutoff_frequency_hz=40),
-                LowpassFilter(cutoff_frequency_hz=12000),
-                LowShelfFilter(cutoff_frequency_hz=120, gain_db=2.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=1000, gain_db=-0.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=5000, gain_db=-1.0, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=-1.5, q=0.8),
-                Compressor(threshold_db=-16, ratio=2.5, attack_ms=20, release_ms=200),
-                Limiter(threshold_db=-1.5, release_ms=150)
-            ]
-        ),
-        
-        "retro_80s": MasteringPreset(
-            "Retro 80s",
-            "1980s-inspired mix with character",
-            [
-                HighpassFilter(cutoff_frequency_hz=45),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=800, gain_db=1.0, q=1.2),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.7),
-                Compressor(threshold_db=-14, ratio=3.5, attack_ms=5, release_ms=100),
-                Limiter(threshold_db=-0.8, release_ms=80)
-            ]
-        ),
-        
-        # Enhancement Presets (Phase 2)
-        "harmonic_enhance": MasteringPreset(
-            "Harmonic Enhance",
-            "Adds subtle harmonic overtones for brightness and warmth",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                # Subtle low-end warmth
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.0, q=0.7),
-                # Presence boost
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.5, q=1.0),
-                # Air and clarity
-                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=2.0, q=0.7),
-                # Gentle saturation effect through compression
-                Compressor(threshold_db=-18, ratio=2.5, attack_ms=10, release_ms=120),
-                # Final limiting
-                Limiter(threshold_db=-0.5, release_ms=100),
-                # Note: Additional harmonic generation would require Distortion plugin
-                # which adds subtle harmonic overtones
-            ]
-        ),
-    }
-    
-    def __init__(self):
-        """Initialize mastering service"""
-        logger.info("Mastering service initialized")
-        
-        # Specialized Presets
-        "vocal_focused": MasteringPreset(
-            "Vocal Focused",
-            "Emphasizes vocal clarity and presence",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                PeakFilter(cutoff_frequency_hz=200, gain_db=-1.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=1000, gain_db=1.0, q=1.0),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=2.5, q=1.2),
-                PeakFilter(cutoff_frequency_hz=5000, gain_db=1.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
-                Compressor(threshold_db=-12, ratio=3.0, attack_ms=5, release_ms=100),
-                Limiter(threshold_db=-0.5, release_ms=80)
-            ]
-        ),
-        
-        "bass_heavy": MasteringPreset(
-            "Bass Heavy",
-            "Maximum low-end power",
-            [
-                HighpassFilter(cutoff_frequency_hz=20),
-                LowShelfFilter(cutoff_frequency_hz=60, gain_db=4.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=100, gain_db=2.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=-1.5, q=1.0),
-                PeakFilter(cutoff_frequency_hz=4000, gain_db=1.0, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.5, q=0.7),
-                Compressor(threshold_db=-10, ratio=4.0, attack_ms=10, release_ms=100),
-                Limiter(threshold_db=-0.3, release_ms=60)
-            ]
-        ),
-        
-        "bright_airy": MasteringPreset(
-            "Bright & Airy",
-            "Crystal clear highs with airiness",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=-0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=-1.0, q=0.8),
-                PeakFilter(cutoff_frequency_hz=5000, gain_db=2.0, q=1.0),
-                PeakFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.0, q=0.7),
-                Compressor(threshold_db=-14, ratio=2.5, attack_ms=8, release_ms=120),
-                Limiter(threshold_db=-0.8, release_ms=100)
-            ]
-        ),
-        
-        "midrange_punch": MasteringPreset(
-            "Midrange Punch",
-            "Powerful mids for presence",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=2.0, q=1.0),
-                PeakFilter(cutoff_frequency_hz=1500, gain_db=2.5, q=1.2),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=2.0, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=0.5, q=0.7),
-                Compressor(threshold_db=-11, ratio=3.5, attack_ms=5, release_ms=90),
-                Limiter(threshold_db=-0.5, release_ms=70)
-            ]
-        ),
-        
-        "dynamic_range": MasteringPreset(
-            "Dynamic Range",
-            "Preserves maximum dynamics",
-            [
-                HighpassFilter(cutoff_frequency_hz=25),
-                PeakFilter(cutoff_frequency_hz=100, gain_db=-0.5, q=0.7),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=0.5, q=0.8),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
-                Compressor(threshold_db=-20, ratio=1.5, attack_ms=20, release_ms=250),
-                Limiter(threshold_db=-2.0, release_ms=200)
-            ]
-        ),
-        
-        "streaming_optimized": MasteringPreset(
-            "Streaming Optimized",
-            "Optimized for streaming platforms (Spotify, Apple Music)",
-            [
-                HighpassFilter(cutoff_frequency_hz=30),
-                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.0, q=0.7),
-                PeakFilter(cutoff_frequency_hz=500, gain_db=0.5, q=0.8),
-                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.5, q=1.0),
-                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.5, q=0.7),
-                Compressor(threshold_db=-14, ratio=3.0, attack_ms=5, release_ms=100),
-                Limiter(threshold_db=-1.0, release_ms=100)
-            ]
-        )
-    }
-    
-    def __init__(self):
-        """Initialize mastering service"""
-        logger.info("Mastering service initialized with 32 presets")
-    
-    def apply_preset(self, audio_path: str, preset_name: str, output_path: str) -> str:
-        """
-        Apply mastering preset to audio file
-        
-        Args:
-            audio_path: Path to input audio file
-            preset_name: Name of preset to apply
-            output_path: Path to save processed audio
-            
-        Returns:
-            Path to processed audio file
-        """
-        try:
-            if preset_name not in self.PRESETS:
-                raise ValueError(f"Unknown preset: {preset_name}")
-            
-            preset = self.PRESETS[preset_name]
-            logger.info(f"Applying preset '{preset.name}' to {audio_path}")
-            
-            # Load audio
-            audio, sr = sf.read(audio_path)
-            
-            # Ensure stereo
-            if len(audio.shape) == 1:
-                audio = np.stack([audio, audio], axis=1)
-            
-            # Create pedalboard with preset chain
-            board = Pedalboard(preset.chain)
-            
-            # Process audio
-            processed = board(audio.T, sr)
-            
-            # Save processed audio
-            sf.write(output_path, processed.T, sr)
-            logger.info(f"Saved mastered audio to {output_path}")
-            
-            return output_path
-            
-        except Exception as e:
-            logger.error(f"Error applying preset: {str(e)}", exc_info=True)
-            raise
-    
-    def apply_custom_eq(
-        self,
-        audio_path: str,
-        output_path: str,
-        eq_bands: List[Dict],
-        compression: Optional[Dict] = None,
-        limiting: Optional[Dict] = None
-    ) -> str:
-        """
-        Apply custom EQ settings to audio file
-        
-        Args:
-            audio_path: Path to input audio file
-            output_path: Path to save processed audio
-            eq_bands: List of EQ band settings
-            compression: Compression settings (optional)
-            limiting: Limiter settings (optional)
-            
-        Returns:
-            Path to processed audio file
-        """
-        try:
-            logger.info(f"Applying custom EQ to {audio_path}")
-            
-            # Load audio
-            audio, sr = sf.read(audio_path)
-            
-            # Ensure stereo
-            if len(audio.shape) == 1:
-                audio = np.stack([audio, audio], axis=1)
-            
-            # Build processing chain
-            chain = []
-            
-            # Add EQ bands
-            for band in eq_bands:
-                band_type = band.get('type', 'peak')
-                freq = band.get('frequency', 1000)
-                gain = band.get('gain', 0)
-                q = band.get('q', 1.0)
-                
-                if band_type == 'highpass':
-                    chain.append(HighpassFilter(cutoff_frequency_hz=freq))
-                elif band_type == 'lowpass':
-                    chain.append(LowpassFilter(cutoff_frequency_hz=freq))
-                elif band_type == 'lowshelf':
-                    chain.append(LowShelfFilter(cutoff_frequency_hz=freq, gain_db=gain, q=q))
-                elif band_type == 'highshelf':
-                    chain.append(HighShelfFilter(cutoff_frequency_hz=freq, gain_db=gain, q=q))
-                else:  # peak
-                    chain.append(PeakFilter(cutoff_frequency_hz=freq, gain_db=gain, q=q))
-            
-            # Add compression if specified
-            if compression:
-                chain.append(Compressor(
-                    threshold_db=compression.get('threshold', -12),
-                    ratio=compression.get('ratio', 2.0),
-                    attack_ms=compression.get('attack', 5),
-                    release_ms=compression.get('release', 100)
-                ))
-            
-            # Add limiting if specified
-            if limiting:
-                chain.append(Limiter(
-                    threshold_db=limiting.get('threshold', -1.0),
-                    release_ms=limiting.get('release', 100)
-                ))
-            
-            # Create and apply pedalboard
-            board = Pedalboard(chain)
-            processed = board(audio.T, sr)
-            
-            # Save processed audio
-            sf.write(output_path, processed.T, sr)
-            logger.info(f"Saved custom EQ audio to {output_path}")
-            
-            return output_path
-            
-        except Exception as e:
-            logger.error(f"Error applying custom EQ: {str(e)}", exc_info=True)
-            raise
-    
-    def get_preset_list(self) -> List[Dict]:
-        """Get list of available presets with descriptions"""
-        return [
-            {
-                'id': key,
-                'name': preset.name,
-                'description': preset.description
-            }
-            for key, preset in self.PRESETS.items()
-        ]
+"""
+Audio mastering service with industry-standard presets using Pedalboard
+"""
+import os
+import logging
+import numpy as np
+from pathlib import Path
+from typing import Dict, List, Optional
+import soundfile as sf
+from pedalboard import (
+    Pedalboard, 
+    Compressor, 
+    Limiter, 
+    Gain,
+    HighpassFilter,
+    LowpassFilter,
+    PeakFilter,
+    LowShelfFilter,
+    HighShelfFilter,
+    Reverb,
+    Chorus,
+    Delay
+)
+
+logger = logging.getLogger(__name__)
+
+class MasteringPreset:
+    """Mastering preset configuration"""
+    
+    def __init__(self, name: str, description: str, chain: List):
+        self.name = name
+        self.description = description
+        self.chain = chain
+
+class MasteringService:
+    """Audio mastering and EQ service"""
+    
+    # Industry-standard mastering presets
+    PRESETS = {
+        # Clean/Transparent Presets
+        "clean_master": MasteringPreset(
+            "Clean Master",
+            "Transparent mastering with gentle compression",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                PeakFilter(cutoff_frequency_hz=100, gain_db=-1, q=0.7),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=0.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
+                Compressor(threshold_db=-12, ratio=2.0, attack_ms=5, release_ms=100),
+                Limiter(threshold_db=-1.0, release_ms=100)
+            ]
+        ),
+        
+        "subtle_warmth": MasteringPreset(
+            "Subtle Warmth",
+            "Gentle low-end enhancement with smooth highs",
+            [
+                HighpassFilter(cutoff_frequency_hz=25),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=200, gain_db=0.8, q=0.5),
+                PeakFilter(cutoff_frequency_hz=8000, gain_db=-0.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=1.0, q=0.7),
+                Compressor(threshold_db=-15, ratio=2.5, attack_ms=10, release_ms=150),
+                Limiter(threshold_db=-0.5, release_ms=100)
+            ]
+        ),
+        
+        # Pop/Commercial Presets
+        "modern_pop": MasteringPreset(
+            "Modern Pop",
+            "Radio-ready pop sound with punchy compression",
+            [
+                HighpassFilter(cutoff_frequency_hz=35),
+                PeakFilter(cutoff_frequency_hz=80, gain_db=-1.5, q=0.8),
+                LowShelfFilter(cutoff_frequency_hz=120, gain_db=2.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=2500, gain_db=1.5, q=1.2),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=0.7),
+                Compressor(threshold_db=-10, ratio=4.0, attack_ms=3, release_ms=80),
+                Limiter(threshold_db=-0.3, release_ms=50)
+            ]
+        ),
+        
+        "radio_ready": MasteringPreset(
+            "Radio Ready",
+            "Maximum loudness for commercial radio",
+            [
+                HighpassFilter(cutoff_frequency_hz=40),
+                PeakFilter(cutoff_frequency_hz=60, gain_db=-2.0, q=1.0),
+                LowShelfFilter(cutoff_frequency_hz=150, gain_db=1.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=2.0, q=1.5),
+                PeakFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.0, q=0.7),
+                Compressor(threshold_db=-8, ratio=6.0, attack_ms=2, release_ms=60),
+                Limiter(threshold_db=-0.1, release_ms=30)
+            ]
+        ),
+        
+        "punchy_commercial": MasteringPreset(
+            "Punchy Commercial",
+            "Aggressive punch for mainstream appeal",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                PeakFilter(cutoff_frequency_hz=100, gain_db=-2.0, q=1.2),
+                LowShelfFilter(cutoff_frequency_hz=200, gain_db=2.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=1000, gain_db=-1.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=4000, gain_db=2.5, q=1.5),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.8),
+                Compressor(threshold_db=-9, ratio=5.0, attack_ms=1, release_ms=50),
+                Limiter(threshold_db=-0.2, release_ms=40)
+            ]
+        ),
+        
+        # Rock/Alternative Presets
+        "rock_master": MasteringPreset(
+            "Rock Master",
+            "Powerful rock sound with emphasis on mids",
+            [
+                HighpassFilter(cutoff_frequency_hz=35),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=400, gain_db=1.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=2000, gain_db=2.0, q=1.2),
+                PeakFilter(cutoff_frequency_hz=5000, gain_db=1.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=1.0, q=0.8),
+                Compressor(threshold_db=-12, ratio=3.5, attack_ms=5, release_ms=120),
+                Limiter(threshold_db=-0.5, release_ms=80)
+            ]
+        ),
+        
+        "metal_aggressive": MasteringPreset(
+            "Metal Aggressive",
+            "Heavy, aggressive metal mastering",
+            [
+                HighpassFilter(cutoff_frequency_hz=40),
+                PeakFilter(cutoff_frequency_hz=80, gain_db=-1.5, q=1.0),
+                LowShelfFilter(cutoff_frequency_hz=150, gain_db=2.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=800, gain_db=-1.5, q=1.2),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=3.0, q=1.5),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=0.7),
+                Compressor(threshold_db=-8, ratio=6.0, attack_ms=1, release_ms=50),
+                Limiter(threshold_db=-0.1, release_ms=30)
+            ]
+        ),
+        
+        "indie_rock": MasteringPreset(
+            "Indie Rock",
+            "Lo-fi character with mid presence",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=120, gain_db=0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=1.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=2500, gain_db=2.0, q=1.2),
+                PeakFilter(cutoff_frequency_hz=7000, gain_db=-0.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=0.5, q=0.8),
+                Compressor(threshold_db=-14, ratio=3.0, attack_ms=8, release_ms=150),
+                Limiter(threshold_db=-0.8, release_ms=100)
+            ]
+        ),
+        
+        # Electronic/EDM Presets
+        "edm_club": MasteringPreset(
+            "EDM Club",
+            "Powerful club sound with deep bass",
+            [
+                HighpassFilter(cutoff_frequency_hz=25),
+                LowShelfFilter(cutoff_frequency_hz=80, gain_db=3.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=150, gain_db=2.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=1000, gain_db=-1.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=5000, gain_db=2.0, q=1.2),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.0, q=0.7),
+                Compressor(threshold_db=-6, ratio=8.0, attack_ms=0.5, release_ms=40),
+                Limiter(threshold_db=0.0, release_ms=20)
+            ]
+        ),
+        
+        "house_groovy": MasteringPreset(
+            "House Groovy",
+            "Smooth house music with rolling bass",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=250, gain_db=1.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=2000, gain_db=0.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.7),
+                Compressor(threshold_db=-10, ratio=4.0, attack_ms=2, release_ms=60),
+                Limiter(threshold_db=-0.2, release_ms=40)
+            ]
+        ),
+        
+        "techno_dark": MasteringPreset(
+            "Techno Dark",
+            "Dark, pounding techno master",
+            [
+                HighpassFilter(cutoff_frequency_hz=35),
+                PeakFilter(cutoff_frequency_hz=60, gain_db=2.0, q=1.0),
+                LowShelfFilter(cutoff_frequency_hz=120, gain_db=1.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=800, gain_db=-2.0, q=1.5),
+                PeakFilter(cutoff_frequency_hz=4000, gain_db=1.0, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=-0.5, q=0.8),
+                Compressor(threshold_db=-8, ratio=6.0, attack_ms=1, release_ms=50),
+                Limiter(threshold_db=-0.1, release_ms=30)
+            ]
+        ),
+        
+        "dubstep_heavy": MasteringPreset(
+            "Dubstep Heavy",
+            "Sub-bass focused with crispy highs",
+            [
+                HighpassFilter(cutoff_frequency_hz=20),
+                PeakFilter(cutoff_frequency_hz=50, gain_db=3.5, q=1.2),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=-2.0, q=1.5),
+                PeakFilter(cutoff_frequency_hz=6000, gain_db=2.5, q=1.2),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.5, q=0.7),
+                Compressor(threshold_db=-6, ratio=10.0, attack_ms=0.3, release_ms=30),
+                Limiter(threshold_db=0.0, release_ms=20)
+            ]
+        ),
+        
+        # Hip-Hop/R&B Presets
+        "hiphop_modern": MasteringPreset(
+            "Hip-Hop Modern",
+            "Contemporary hip-hop with deep bass",
+            [
+                HighpassFilter(cutoff_frequency_hz=25),
+                LowShelfFilter(cutoff_frequency_hz=80, gain_db=2.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=150, gain_db=1.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=1000, gain_db=-1.0, q=1.0),
+                PeakFilter(cutoff_frequency_hz=3500, gain_db=2.0, q=1.2),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.5, q=0.7),
+                Compressor(threshold_db=-10, ratio=4.0, attack_ms=5, release_ms=80),
+                Limiter(threshold_db=-0.3, release_ms=60)
+            ]
+        ),
+        
+        "trap_808": MasteringPreset(
+            "Trap 808",
+            "808-focused trap mastering",
+            [
+                HighpassFilter(cutoff_frequency_hz=20),
+                PeakFilter(cutoff_frequency_hz=50, gain_db=3.0, q=1.0),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=800, gain_db=-1.5, q=1.2),
+                PeakFilter(cutoff_frequency_hz=5000, gain_db=2.5, q=1.2),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=2.0, q=0.7),
+                Compressor(threshold_db=-8, ratio=5.0, attack_ms=3, release_ms=60),
+                Limiter(threshold_db=-0.2, release_ms=40)
+            ]
+        ),
+        
+        "rnb_smooth": MasteringPreset(
+            "R&B Smooth",
+            "Silky smooth R&B sound",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=300, gain_db=1.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=2000, gain_db=0.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=6000, gain_db=1.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.7),
+                Compressor(threshold_db=-12, ratio=3.0, attack_ms=8, release_ms=120),
+                Limiter(threshold_db=-0.5, release_ms=80)
+            ]
+        ),
+        
+        # Acoustic/Organic Presets
+        "acoustic_natural": MasteringPreset(
+            "Acoustic Natural",
+            "Natural, transparent acoustic sound",
+            [
+                HighpassFilter(cutoff_frequency_hz=25),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=0.8, q=0.8),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.0, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=0.7),
+                Compressor(threshold_db=-16, ratio=2.0, attack_ms=15, release_ms=200),
+                Limiter(threshold_db=-1.0, release_ms=120)
+            ]
+        ),
+        
+        "folk_warm": MasteringPreset(
+            "Folk Warm",
+            "Warm, intimate folk sound",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=150, gain_db=1.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=400, gain_db=1.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=2500, gain_db=1.0, q=1.0),
+                PeakFilter(cutoff_frequency_hz=7000, gain_db=-0.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.8),
+                Compressor(threshold_db=-18, ratio=2.5, attack_ms=20, release_ms=250),
+                Limiter(threshold_db=-1.5, release_ms=150)
+            ]
+        ),
+        
+        "jazz_vintage": MasteringPreset(
+            "Jazz Vintage",
+            "Classic jazz warmth and space",
+            [
+                HighpassFilter(cutoff_frequency_hz=35),
+                LowShelfFilter(cutoff_frequency_hz=120, gain_db=1.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=1.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=2000, gain_db=0.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=8000, gain_db=-1.0, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=0.5, q=0.8),
+                Compressor(threshold_db=-20, ratio=2.0, attack_ms=25, release_ms=300),
+                Limiter(threshold_db=-2.0, release_ms=180)
+            ]
+        ),
+        
+        # Classical/Orchestral Presets
+        "orchestral_wide": MasteringPreset(
+            "Orchestral Wide",
+            "Wide, natural orchestral sound",
+            [
+                HighpassFilter(cutoff_frequency_hz=20),
+                LowShelfFilter(cutoff_frequency_hz=80, gain_db=0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=300, gain_db=0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=4000, gain_db=0.8, q=0.8),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
+                Compressor(threshold_db=-24, ratio=1.5, attack_ms=30, release_ms=400),
+                Limiter(threshold_db=-3.0, release_ms=250)
+            ]
+        ),
+        
+        "classical_concert": MasteringPreset(
+            "Classical Concert",
+            "Concert hall ambience and dynamics",
+            [
+                HighpassFilter(cutoff_frequency_hz=25),
+                PeakFilter(cutoff_frequency_hz=200, gain_db=0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=1000, gain_db=0.3, q=0.8),
+                PeakFilter(cutoff_frequency_hz=6000, gain_db=0.8, q=0.8),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=0.5, q=0.7),
+                Compressor(threshold_db=-30, ratio=1.2, attack_ms=50, release_ms=500),
+                Limiter(threshold_db=-4.0, release_ms=300)
+            ]
+        ),
+        
+        # Ambient/Atmospheric Presets
+        "ambient_spacious": MasteringPreset(
+            "Ambient Spacious",
+            "Wide, spacious ambient master",
+            [
+                HighpassFilter(cutoff_frequency_hz=25),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=-0.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=0.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=1.5, q=0.7),
+                Compressor(threshold_db=-20, ratio=2.0, attack_ms=50, release_ms=400),
+                Limiter(threshold_db=-2.0, release_ms=200)
+            ]
+        ),
+        
+        "cinematic_epic": MasteringPreset(
+            "Cinematic Epic",
+            "Big, powerful cinematic sound",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=2.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=250, gain_db=1.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=2000, gain_db=1.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=6000, gain_db=2.0, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=0.7),
+                Compressor(threshold_db=-14, ratio=3.0, attack_ms=10, release_ms=150),
+                Limiter(threshold_db=-0.5, release_ms=100)
+            ]
+        ),
+        
+        # Vintage/Lo-Fi Presets
+        "lofi_chill": MasteringPreset(
+            "Lo-Fi Chill",
+            "Vintage lo-fi character",
+            [
+                HighpassFilter(cutoff_frequency_hz=50),
+                LowpassFilter(cutoff_frequency_hz=10000),
+                LowShelfFilter(cutoff_frequency_hz=150, gain_db=1.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=800, gain_db=-1.0, q=1.2),
+                PeakFilter(cutoff_frequency_hz=4000, gain_db=-1.5, q=1.0),
+                Compressor(threshold_db=-12, ratio=3.0, attack_ms=15, release_ms=180),
+                Limiter(threshold_db=-1.0, release_ms=120)
+            ]
+        ),
+        
+        "vintage_vinyl": MasteringPreset(
+            "Vintage Vinyl",
+            "Classic vinyl record warmth",
+            [
+                HighpassFilter(cutoff_frequency_hz=40),
+                LowpassFilter(cutoff_frequency_hz=12000),
+                LowShelfFilter(cutoff_frequency_hz=120, gain_db=2.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=1000, gain_db=-0.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=5000, gain_db=-1.0, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=-1.5, q=0.8),
+                Compressor(threshold_db=-16, ratio=2.5, attack_ms=20, release_ms=200),
+                Limiter(threshold_db=-1.5, release_ms=150)
+            ]
+        ),
+        
+        "retro_80s": MasteringPreset(
+            "Retro 80s",
+            "1980s-inspired mix with character",
+            [
+                HighpassFilter(cutoff_frequency_hz=45),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=800, gain_db=1.0, q=1.2),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=2.0, q=0.7),
+                Compressor(threshold_db=-14, ratio=3.5, attack_ms=5, release_ms=100),
+                Limiter(threshold_db=-0.8, release_ms=80)
+            ]
+        ),
+        
+        # Enhancement Presets (Phase 2)
+        "harmonic_enhance": MasteringPreset(
+            "Harmonic Enhance",
+            "Adds subtle harmonic overtones for brightness and warmth",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                # Subtle low-end warmth
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.0, q=0.7),
+                # Presence boost
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.5, q=1.0),
+                # Air and clarity
+                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=2.0, q=0.7),
+                # Gentle saturation effect through compression
+                Compressor(threshold_db=-18, ratio=2.5, attack_ms=10, release_ms=120),
+                # Final limiting
+                Limiter(threshold_db=-0.5, release_ms=100),
+                # Note: Additional harmonic generation would require Distortion plugin
+                # which adds subtle harmonic overtones
+            ]
+        ),
+        
+        # Specialized Presets
+        "vocal_focused": MasteringPreset(
+            "Vocal Focused",
+            "Emphasizes vocal clarity and presence",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                PeakFilter(cutoff_frequency_hz=200, gain_db=-1.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=1000, gain_db=1.0, q=1.0),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=2.5, q=1.2),
+                PeakFilter(cutoff_frequency_hz=5000, gain_db=1.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
+                Compressor(threshold_db=-12, ratio=3.0, attack_ms=5, release_ms=100),
+                Limiter(threshold_db=-0.5, release_ms=80)
+            ]
+        ),
+        
+        "bass_heavy": MasteringPreset(
+            "Bass Heavy",
+            "Maximum low-end power",
+            [
+                HighpassFilter(cutoff_frequency_hz=20),
+                LowShelfFilter(cutoff_frequency_hz=60, gain_db=4.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=100, gain_db=2.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=-1.5, q=1.0),
+                PeakFilter(cutoff_frequency_hz=4000, gain_db=1.0, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.5, q=0.7),
+                Compressor(threshold_db=-10, ratio=4.0, attack_ms=10, release_ms=100),
+                Limiter(threshold_db=-0.3, release_ms=60)
+            ]
+        ),
+        
+        "bright_airy": MasteringPreset(
+            "Bright & Airy",
+            "Crystal clear highs with airiness",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=-0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=-1.0, q=0.8),
+                PeakFilter(cutoff_frequency_hz=5000, gain_db=2.0, q=1.0),
+                PeakFilter(cutoff_frequency_hz=10000, gain_db=2.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=12000, gain_db=3.0, q=0.7),
+                Compressor(threshold_db=-14, ratio=2.5, attack_ms=8, release_ms=120),
+                Limiter(threshold_db=-0.8, release_ms=100)
+            ]
+        ),
+        
+        "midrange_punch": MasteringPreset(
+            "Midrange Punch",
+            "Powerful mids for presence",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=2.0, q=1.0),
+                PeakFilter(cutoff_frequency_hz=1500, gain_db=2.5, q=1.2),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=2.0, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=8000, gain_db=0.5, q=0.7),
+                Compressor(threshold_db=-11, ratio=3.5, attack_ms=5, release_ms=90),
+                Limiter(threshold_db=-0.5, release_ms=70)
+            ]
+        ),
+        
+        "dynamic_range": MasteringPreset(
+            "Dynamic Range",
+            "Preserves maximum dynamics",
+            [
+                HighpassFilter(cutoff_frequency_hz=25),
+                PeakFilter(cutoff_frequency_hz=100, gain_db=-0.5, q=0.7),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=0.5, q=0.8),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.0, q=0.7),
+                Compressor(threshold_db=-20, ratio=1.5, attack_ms=20, release_ms=250),
+                Limiter(threshold_db=-2.0, release_ms=200)
+            ]
+        ),
+        
+        "streaming_optimized": MasteringPreset(
+            "Streaming Optimized",
+            "Optimized for streaming platforms (Spotify, Apple Music)",
+            [
+                HighpassFilter(cutoff_frequency_hz=30),
+                LowShelfFilter(cutoff_frequency_hz=100, gain_db=1.0, q=0.7),
+                PeakFilter(cutoff_frequency_hz=500, gain_db=0.5, q=0.8),
+                PeakFilter(cutoff_frequency_hz=3000, gain_db=1.5, q=1.0),
+                HighShelfFilter(cutoff_frequency_hz=10000, gain_db=1.5, q=0.7),
+                Compressor(threshold_db=-14, ratio=3.0, attack_ms=5, release_ms=100),
+                Limiter(threshold_db=-1.0, release_ms=100)
+            ]
+        )
+    }
+    
+    def __init__(self):
+        """Initialize mastering service"""
+        logger.info("Mastering service initialized with 32 presets")
+    
+    def apply_preset(self, audio_path: str, preset_name: str, output_path: str) -> str:
+        """
+        Apply mastering preset to audio file
+        
+        Args:
+            audio_path: Path to input audio file
+            preset_name: Name of preset to apply
+            output_path: Path to save processed audio
+            
+        Returns:
+            Path to processed audio file
+        """
+        try:
+            if preset_name not in self.PRESETS:
+                raise ValueError(f"Unknown preset: {preset_name}")
+            
+            preset = self.PRESETS[preset_name]
+            logger.info(f"Applying preset '{preset.name}' to {audio_path}")
+            
+            # Load audio
+            audio, sr = sf.read(audio_path)
+            
+            # Ensure stereo
+            if len(audio.shape) == 1:
+                audio = np.stack([audio, audio], axis=1)
+            
+            # Create pedalboard with preset chain
+            board = Pedalboard(preset.chain)
+            
+            # Process audio
+            processed = board(audio.T, sr)
+            
+            # Save processed audio
+            sf.write(output_path, processed.T, sr)
+            logger.info(f"Saved mastered audio to {output_path}")
+            
+            return output_path
+            
+        except Exception as e:
+            logger.error(f"Error applying preset: {str(e)}", exc_info=True)
+            raise
+    
+    def apply_custom_eq(
+        self,
+        audio_path: str,
+        output_path: str,
+        eq_bands: List[Dict],
+        compression: Optional[Dict] = None,
+        limiting: Optional[Dict] = None
+    ) -> str:
+        """
+        Apply custom EQ settings to audio file
+        
+        Args:
+            audio_path: Path to input audio file
+            output_path: Path to save processed audio
+            eq_bands: List of EQ band settings
+            compression: Compression settings (optional)
+            limiting: Limiter settings (optional)
+            
+        Returns:
+            Path to processed audio file
+        """
+        try:
+            logger.info(f"Applying custom EQ to {audio_path}")
+            
+            # Load audio
+            audio, sr = sf.read(audio_path)
+            
+            # Ensure stereo
+            if len(audio.shape) == 1:
+                audio = np.stack([audio, audio], axis=1)
+            
+            # Build processing chain
+            chain = []
+            
+            # Add EQ bands
+            for band in eq_bands:
+                band_type = band.get('type', 'peak')
+                freq = band.get('frequency', 1000)
+                gain = band.get('gain', 0)
+                q = band.get('q', 1.0)
+                
+                if band_type == 'highpass':
+                    chain.append(HighpassFilter(cutoff_frequency_hz=freq))
+                elif band_type == 'lowpass':
+                    chain.append(LowpassFilter(cutoff_frequency_hz=freq))
+                elif band_type == 'lowshelf':
+                    chain.append(LowShelfFilter(cutoff_frequency_hz=freq, gain_db=gain, q=q))
+                elif band_type == 'highshelf':
+                    chain.append(HighShelfFilter(cutoff_frequency_hz=freq, gain_db=gain, q=q))
+                else:  # peak
+                    chain.append(PeakFilter(cutoff_frequency_hz=freq, gain_db=gain, q=q))
+            
+            # Add compression if specified
+            if compression:
+                chain.append(Compressor(
+                    threshold_db=compression.get('threshold', -12),
+                    ratio=compression.get('ratio', 2.0),
+                    attack_ms=compression.get('attack', 5),
+                    release_ms=compression.get('release', 100)
+                ))
+            
+            # Add limiting if specified
+            if limiting:
+                chain.append(Limiter(
+                    threshold_db=limiting.get('threshold', -1.0),
+                    release_ms=limiting.get('release', 100)
+                ))
+            
+            # Create and apply pedalboard
+            board = Pedalboard(chain)
+            processed = board(audio.T, sr)
+            
+            # Save processed audio
+            sf.write(output_path, processed.T, sr)
+            logger.info(f"Saved custom EQ audio to {output_path}")
+            
+            return output_path
+            
+        except Exception as e:
+            logger.error(f"Error applying custom EQ: {str(e)}", exc_info=True)
+            raise
+    
+    def get_preset_list(self) -> List[Dict]:
+        """Get list of available presets with descriptions"""
+        return [
+            {
+                'id': key,
+                'name': preset.name,
+                'description': preset.description
+            }
+            for key, preset in self.PRESETS.items()
+        ]