Feature/audio quality improvements#12
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…th FX - per_track_saturate: linear below ±1.0 (was cubic clip losing 33% at peak) - Headroom factor 0.5 → 0.7 (soft_clip already prevents clipping) - Crush compressor only active when compressor knob engaged - Fix: synth reverb/delay no longer double-counted through drum bus - Kick sub-oscillator 0.5× → 0.75× (41 Hz vs 27 Hz, audible on speakers) - Kick 2nd harmonic at 25% for mid-range presence - drum_volume default 0.8 → 1.0 - Stereo: synths A/B panned slightly L/R, reverb/delay decorrelated Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
…sampling, PolyBLEP - FDN reverb: 8-delay-line Feedback Delay Network with Householder matrix replaces Schroeder on drum bus. Native stereo output (odd/even lines). - Lookahead limiter: 1ms lookahead true peak limiter replaces crude tanh soft_clip. Preserves transient shape while preventing clipping. - Sidechain compression: kick envelope follower ducks synths ~6dB on hits. Fast 1ms attack, 80ms release for natural pumping. - 2× oversampling: TubeSaturator waveshaping now processed at double rate to reduce aliasing from nonlinear harmonics. - PolyBLEP anti-aliasing: synth oscillators upgraded to f64 precision PolyBLEP correction on saw/square waveforms. 55 tests pass (6 new: FDN decay, FDN stereo, limiter clamp, sidechain envelope, oversampler passthrough, PolyBLEP correction). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Version 1.3.0 → 1.4.0 - Tests badge 48 → 55, LOC badge 20k → 17k - Effects description: FDN reverb, lookahead limiter, sidechain, 2× oversampled saturator, PolyBLEP oscillators - Update CLAUDE.md test count and effects.rs description Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Sidechain amount as EffectParams field (saved in projects, serde default) - Shift+D cycles: Off / Light / Medium / Heavy / Max - SC gauge in transport bar beside CMP and SAT - Help overlay: added missing scenes, file ops, drum pad step-entry, Ctrl+J/P/L, Ctrl+C/Q, ? self-reference Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Musical emoji on section headers, feature list, and footer. Easter egg quote at bottom. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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