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Authentic TR-808/909 Drum Synthesis Implementation#111

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feat/authentic-drum-synthesis-8197089548483668688
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Authentic TR-808/909 Drum Synthesis Implementation#111
Pitrat-wav wants to merge 1 commit into
mainfrom
feat/authentic-drum-synthesis-8197089548483668688

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@Pitrat-wav

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This PR implements authentic virtual-analog drum synthesis for the TR-808 and TR-909 models, based on deep DSP analysis. Key enhancements include:

  • LFSR Noise: Authentic 15-bit digital noise for the 909 Snare.
  • Improved 808 Kick: Two-stage envelopes to simulate the "tonk" attack and diode damping.
  • Polyphony & Disposal: Better voice tracking and explicit cleanup of AudioNodes to prevent memory leaks.
  • State Sync: Automatic synchronization of drum parameters on engine launch.
  • Techno Presets: A new "Randomize Techno" button to quickly set up optimized patterns.

PR created automatically by Jules for task 8197089548483668688 started by @Pitrat-wav

- Implemented 15-bit LFSR noise for TR-909 snare.
- Refined TR-808 Kick with two-stage pitch and amplitude envelopes (diode damping emulation).
- Improved polyphony and disposal management for Hi-Hats and Cowbell.
- Added parameter synchronization between UI state and audio engine.
- Implemented 'Randomize Techno' feature in DrumsView with haptic feedback.
- Set optimized techno defaults for Euclidean patterns.
- Ensured proper node disposal in all drum models to prevent memory leaks.

Co-authored-by: Pitrat-wav <255843145+Pitrat-wav@users.noreply.github.com>
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💡 Codex Review

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Reviewed commit: d79804a8d7

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oscHigh.dispose();
gainLow.dispose();
gainHigh.dispose();
masterTonalGain.dispose();

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P1 Badge Remove the undefined snare cleanup reference

When the 808 snare voice stops, this cleanup callback now calls masterTonalGain.dispose(), but no masterTonalGain is declared anywhere in TR808Snare.trigger. This breaks TypeScript compilation (Cannot find name 'masterTonalGain') and would also throw during cleanup if emitted, so the app cannot reliably build/play 808 snares after this change.

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