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-rw-r--r--docs/modding_your_keyboard.md4
-rw-r--r--quantum/process_keycode/process_audio.c6
2 files changed, 9 insertions, 1 deletions
diff --git a/docs/modding_your_keyboard.md b/docs/modding_your_keyboard.md
index 5613bf5253..a58fbd52b2 100644
--- a/docs/modding_your_keyboard.md
+++ b/docs/modding_your_keyboard.md
@@ -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!
+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
This is still a WIP, but check out `quantum/keymap_midi.c` to see what's happening. Enable from the Makefile.
diff --git a/quantum/process_keycode/process_audio.c b/quantum/process_keycode/process_audio.c
index eb74796fa7..32057ae8dc 100644
--- a/quantum/process_keycode/process_audio.c
+++ b/quantum/process_keycode/process_audio.c
@@ -6,10 +6,14 @@
#endif
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)
{
// 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) {