2 commits

Author	SHA1	Message	Date
John McCardle	732897426a	Audio fixes: gain() DSP effect, sfxr phase wrap, SDL2 backend compat ... - SoundBuffer.gain(factor): new DSP method for amplitude scaling before mixing (0.5 = half volume, 2.0 = double, clamped to int16 range) - Fix sfxr square/saw waveform artifacts: phase now wraps at period boundary instead of growing unbounded; noise buffer refreshes per period - Fix PySound construction from SoundBuffer on SDL2 backend: use loadFromSamples() directly instead of copy-assign (deleted on SDL2) - Add Image::create(w, h, pixels) overload to HeadlessTypes and SDL2Types for pixel data initialization - Waveform test suite (62 lines) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>	2026-02-20 23:17:41 -05:00
John McCardle	97dbec9106	Add SoundBuffer type: procedural audio, sfxr synthesis, DSP effects ... New SoundBuffer Python type enables procedural audio generation: - Tone synthesis (sine, square, saw, triangle, noise) with ADSR envelopes - sfxr retro sound effect engine (7 presets, 24 params, mutation, seeding) - DSP effects chain: pitch_shift, low/high pass, echo, reverb, distortion, bit_crush, normalize, reverse, slice - Composition: concat (with crossfade overlap) and mix - Sound() now accepts SoundBuffer or filename string - Sound gains pitch property and play_varied() method - Platform stubs for HeadlessTypes and SDL2Types (loadFromSamples, pitch) - Interactive demo: sfxr clone UI + Animalese speech synthesizer - 62 unit tests across 6 test files (all passing) Refs #251 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>	2026-02-19 18:58:11 -05:00