Phase 1: Professional DJ Audio Engine ✅
We've transformed our web-based DJ platform into a performance-ready audio system with three breakthrough features:
1. RAM-Based Playback System
What we built: Zero-latency audio engine using AudioBufferSourceNode
The magic:
Instant track loading - Files load directly into memory as ArrayBuffers
Sample-accurate seeking - Cue points hit immediately, no buffering delays
Pro-level performance - Eliminated HTML5 audio drift and lag completely
Hybrid "DVS" Architecture:
text ┌─────────────────┐ ┌──────────────────┐ │ UI Layer │ │ Audio Layer │ │ (Waveforms, │ ←── │ RAM Buffers │ │ Sliders) │ │ │ (Performance) │ └─────────────────┘ └──────────────────┘ ↓ ↓ HTMLMediaElement AudioBufferSourceNode (Muted & Synced) (Master Output) Best of both worlds: Visual feedback from HTML5 + Studio-quality audio from Web Audio API
2. Master Bus Limiter
What we built: Professional dynamics processing chain
Protection specs:
Threshold: -0.5dB (headroom for transients)
Ratio: 20:1 (brickwall limiting)
Attack/Release: Optimized for EDM/pop music
Why it matters:
text Deck A (-3dB) + Deck B (-3dB) + AI Track (-6dB) = ❌ CLIPPING (0dB+) Deck A (-3dB) + Deck B (-3dB) + AI Track (-6dB) = ✅ CLEAN (-0.5dB peak) Three tracks, zero distortion. Push the faders without fear.
3. Technical Implementation
Core Updates:
ChannelStrip in audioEngine.ts - Now manages RAM buffers & file decoding
App.tsx - Added "Decoding..." status for transparent file processing
Fixed TypeScript interface - onQuantize properly typed in MixerChannel
User Experience Flow:
text Drop Track → Decode → RAM Cache → Instant Playback [Status UI] [Buffer] [Ready] [Zero Latency]
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