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2026-03-02feat(audio): OLA-IDCT synthesis with Hann window to eliminate clicksskal
Add v2 spectrogram format (SPEC_VERSION_V2_OLA) using overlap-add IDCT with 50% overlap (hop=256, OLA_OVERLAP=256) and Hann windowing. - dct.h: OLA_HOP_SIZE=256, OLA_OVERLAP=256 - synth.h: SPEC_VERSION_V1/V2_OLA constants; version field on Spectrogram - window.h/cc: hann_window_512() alongside existing hamming_window_512() - synth.cc: g_hann[] precomputed at init; OLA path in synth_render when ola_mode=true (IDCT -> Hann -> add overlap tail -> save new tail -> output OLA_HOP_SIZE samples); v1 path unchanged for backward compat - tracker.cc: MP3 encoder now uses sliding 512-sample Hann window with OLA_HOP_SIZE advance per frame; sets version=SPEC_VERSION_V2_OLA; .spec files propagate header->version; generated notes stay v1 Existing .spec files must be regenerated to benefit from click-free OLA. handoff(Claude): OLA done. .spec files need regen via MP3 tool to activate v2.
2026-02-01clang-formatskal
2026-01-31Chore: Add missing newlines at end of source filesskal
2026-01-28update asset systemskal
2026-01-28style: Add 3-line descriptive headers to all source filesskal
This commit applies a new project-wide rule that every source file must begin with a concise 3-line comment header describing its purpose. - Updated CONTRIBUTING.md with the new rule. - Applied headers to all .cc and .h files in src/ and tools/. - Fixed various minor compilation errors and missing includes discovered during the header update process.
2026-01-27feat: Implement spectool & specview; refactor coding style; update docsskal
This commit introduces new tools for spectrogram manipulation and visualization, establishes a consistent coding style, and updates project documentation. Key changes include: - **Spectrogram Tools: - : A command-line utility for analyzing WAV/MP3 files into custom spectrogram format and playing back these spectrograms via the synth engine. - : A command-line tool for visualizing spectrogram files as ASCII art in the console. - **Coding Style Enforcement: - Added a configuration file enforcing LLVM-based style with 2-space indentation, no tabs, and an 80-column line limit. - Renamed all C++ source files from to for project consistency. - Applied automatic formatting using exit across the entire codebase. - **Documentation & Workflow: - Created to define a commit policy requiring tests to pass before committing. - Updated with instructions for building and using and , and referenced . - Updated and to reflect the new tools, audio architecture decisions (real-time additive synthesis, double-buffering for dynamic updates, WAV/MP3 support), coding style, and development workflow. - **Build System: - Modified to: - Include new targets for and under the option. - Update source file extensions to . - Add a new end-to-end test for to the suite.