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6b2db48339530cd9d90cfecb039756dfc1a5f629
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3 Commits
Author SHA1 Message Date
gurixandClaude Opus 4.6 6b2db48339 feat(synth): add LFO modulation, ADSR envelopes, pentatonic tuning, and soft limiter 
Replace static EMA-smoothed drones with an evolving ambient soundscape:
- ADSR envelope system with sustained (2s attack, 4s release) and bursty
  (30ms attack, no sustain) modes per protocol group
- LFO pitch wobble and amplitude tremolo with incommensurable rates per
  group (Eno technique) so modulation patterns never repeat
- C major pentatonic frequency tuning (just intonation) — any combination
  of active protocols sounds consonant
- tanh soft limiter on master output prevents clipping
- Sync all documentation: README, PROJECT.md, ARCHITECTURE.md, v1.2
  requirements traceability

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-03-27 19:38:58 +01:00
gurix 7f6471426f feat(05-01): wire waveform resolution into NewLayer at construction time 
- NewLayer resolves WaveformPresetHarmonics when cfg.WaveformType != WaveformCustom
- Preset harmonics stored in Layer.Config so AdvanceSample uses them unchanged
- WaveformCustom path preserves existing hand-tuned harmonics (backward compatible)
- TestNewLayerResolvesWaveformPreset: verifies preset fills harmonics on construction
- TestNewLayerPreservesCustomHarmonics: verifies hand-tuned harmonics are untouched
- TestSineRegressionVsCustomHarmonics: verifies WaveformSine == {Ratio:1,Amp:1.0}
- All 41 synth tests pass, encode tests unaffected
 2026-03-26 17:34:45 +01:00
gurix 1aaa15de0b feat(02-01): implement synth config, oscillator, and layer 
- synth/config.go: FreqConfig, HarmonicDef types; ClassFreqConfigs for all 11 traffic classes
  with frequencies in 60-800 Hz using musical intervals; pan positions per D-12
- synth/oscillator.go: phase-accumulator oscillator with additive harmonic synthesis
  and phase subtraction wrap (not math.Mod) per D-05
- synth/layer.go: EMA amplitude smoothing with tau-based alpha; whisper floor (0.03)
  prevents silence once class has been seen; UpdateTarget/AdvanceSample interface
- All 12 tests pass (TestAllClassesHaveConfig, TestFrequenciesUnique, TestEMAAmplitudeRise, etc.)
 2026-03-26 11:58:44 +01:00