A fast, static, browser-based chromatic tuner built as a single index.html file. It uses the Web Audio API and an autocorrelation pitch detector to show:
- detected note + octave
- frequency in Hz
- cents deviation
- flat/perfect/sharp horizontal meter
It includes intelligent smoothing, note stability lock, freeze-on-meter tap, mobile-friendly layout, settings (A4/theme/sound/show-frequency), and localStorage preferences.
Build a tuner app in the tuner-codex directory, based on this spec tuner-spec.md