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adds option for alt pitch standards

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This commit is contained in:
Jack Humbert 2017-07-24 12:44:03 -04:00
parent a543ad4c1d
commit cefc09ae7d
2 changed files with 9 additions and 1 deletions
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4
docs/modding_your_keyboard.md
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@ -79,6 +79,10 @@ By default, `MUSIC_MASK` is set to `keycode < 0xFF` which means keycodes less th
Which will capture all keycodes - be careful, this will get you stuck in music mode until you restart your keyboard! Which will capture all keycodes - be careful, this will get you stuck in music mode until you restart your keyboard!
The pitch standard (`PITCH_STANDARD_A`) is 440.0f by default - to change this, add something like this to your `config.h`:
#define PITCH_STANDARD_A 432.0f
## MIDI functionalty ## MIDI functionalty
This is still a WIP, but check out `quantum/keymap_midi.c` to see what's happening. Enable from the Makefile. This is still a WIP, but check out `quantum/keymap_midi.c` to see what's happening. Enable from the Makefile.

6
quantum/process_keycode/process_audio.c
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@ -6,10 +6,14 @@
#endif #endif
float voice_change_song[][2] = VOICE_CHANGE_SONG; float voice_change_song[][2] = VOICE_CHANGE_SONG;
#ifndef PITCH_STANDARD_A
#define PITCH_STANDARD_A 440.0f
#endif
static float compute_freq_for_midi_note(uint8_t note) static float compute_freq_for_midi_note(uint8_t note)
{ {
// https://en.wikipedia.org/wiki/MIDI_tuning_standard // https://en.wikipedia.org/wiki/MIDI_tuning_standard
return pow(2.0, (note - 69) / 12.0) * 440.0f; return pow(2.0, (note - 69) / 12.0) * PITCH_STANDARD_A;
} }
bool process_audio(uint16_t keycode, keyrecord_t *record) { bool process_audio(uint16_t keycode, keyrecord_t *record) {