diff options
| -rw-r--r-- | src/audio/wav_dump_backend.cc | 48 |
1 files changed, 27 insertions, 21 deletions
diff --git a/src/audio/wav_dump_backend.cc b/src/audio/wav_dump_backend.cc index fbbbeaa..f558c39 100644 --- a/src/audio/wav_dump_backend.cc +++ b/src/audio/wav_dump_backend.cc @@ -54,32 +54,38 @@ void WavDumpBackend::start() { float music_time = 0.0f; float tempo_scale = 1.0f; float physical_time = 0.0f; - const float dt = (float)kBufferSize / kSampleRate; // Time per buffer + const float buffer_dt = (float)kBufferSize / kSampleRate; // Time per buffer + const float update_dt = 1.0f / 60.0f; // Update rate: 60Hz (matches main loop) for (size_t frame = 0; frame < total_frames; ++frame) { - // Update tempo scaling (matches main.cc phases) - if (physical_time < 10.0f) { - tempo_scale = 1.0f; - } else if (physical_time < 15.0f) { - const float progress = (physical_time - 10.0f) / 5.0f; - tempo_scale = 1.0f + progress * 1.0f; // 1.0 → 2.0 - } else if (physical_time < 20.0f) { - tempo_scale = 1.0f; - } else if (physical_time < 25.0f) { - const float progress = (physical_time - 20.0f) / 5.0f; - tempo_scale = 1.0f - progress * 0.5f; // 1.0 → 0.5 - } else { - tempo_scale = 1.0f; - } + // Call tracker_update() multiple times per audio buffer + // This matches the main loop update frequency (~60 Hz) + const int num_updates = (int)(buffer_dt / update_dt) + 1; + for (int update = 0; update < num_updates; ++update) { + // Update tempo scaling (matches main.cc phases) + if (physical_time < 10.0f) { + tempo_scale = 1.0f; + } else if (physical_time < 15.0f) { + const float progress = (physical_time - 10.0f) / 5.0f; + tempo_scale = 1.0f + progress * 1.0f; // 1.0 → 2.0 + } else if (physical_time < 20.0f) { + tempo_scale = 1.0f; + } else if (physical_time < 25.0f) { + const float progress = (physical_time - 20.0f) / 5.0f; + tempo_scale = 1.0f - progress * 0.5f; // 1.0 → 0.5 + } else { + tempo_scale = 1.0f; + } - // Advance music time - music_time += dt * tempo_scale; - physical_time += dt; + // Advance music time at smaller time steps + music_time += update_dt * tempo_scale; + physical_time += update_dt; - // Update tracker to trigger patterns - tracker_update(music_time); + // Update tracker to trigger patterns (high frequency) + tracker_update(music_time); + } - // Render audio from synth + // Render audio from synth (accumulated triggers from updates above) synth_render(sample_buffer_.data(), kBufferSize); // Convert float to int16 and write to WAV |