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Midi: correct pitch bend in ALSA driver 

MIDI standard pitch bend center position is 0x2000 but ALSA's is 0
This commit is contained in:
Adrien Moulin 2019-08-14 21:47:54 +02:00
parent a545499496
commit 9cecf6623f
1 changed files with 1 additions and 1 deletions
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2
midi/drivers/alsa_midi.c
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@ -435,7 +435,7 @@ static bool alsa_midi_write(void *p, const midi_event_t *event)
else if (ev.type == SND_SEQ_EVENT_PITCHBEND) else if (ev.type == SND_SEQ_EVENT_PITCHBEND)
{ {
ev.data.control.channel = event->data[0] & 0x0F; ev.data.control.channel = event->data[0] & 0x0F;
ev.data.control.value = event->data[1] | (event->data[2] << 7); ev.data.control.value = (event->data[1] | (event->data[2] << 7)) - 0x2000;
} }
else if (ev.type == SND_SEQ_EVENT_SYSEX) else if (ev.type == SND_SEQ_EVENT_SYSEX)
{ {