From 2bcac45650563822f20a2336a9fc4d95b2cc4e3e Mon Sep 17 00:00:00 2001
From: 3araht <69518343+3araht@users.noreply.github.com>
Date: Mon, 5 Oct 2020 06:32:24 +0900
Subject: [PATCH] Fix for MIDI sustain effect issue (#10361)

---
 quantum/process_keycode/process_midi.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/quantum/process_keycode/process_midi.c b/quantum/process_keycode/process_midi.c
index b2fb902eb4..e525770144 100644
--- a/quantum/process_keycode/process_midi.c
+++ b/quantum/process_keycode/process_midi.c
@@ -68,10 +68,12 @@ bool process_midi(uint16_t keycode, keyrecord_t *record) {
             uint8_t tone     = keycode - MIDI_TONE_MIN;
             uint8_t velocity = compute_velocity(midi_config.velocity);
             if (record->event.pressed) {
-                uint8_t note = midi_compute_note(keycode);
-                midi_send_noteon(&midi_device, channel, note, velocity);
-                dprintf("midi noteon channel:%d note:%d velocity:%d\n", channel, note, velocity);
-                tone_status[tone] = note;
+                if (tone_status[tone] == MIDI_INVALID_NOTE) {
+                    uint8_t note = midi_compute_note(keycode);
+                    midi_send_noteon(&midi_device, channel, note, velocity);
+                    dprintf("midi noteon channel:%d note:%d velocity:%d\n", channel, note, velocity);
+                    tone_status[tone] = note;
+                }
             } else {
                 uint8_t note = tone_status[tone];
                 if (note != MIDI_INVALID_NOTE) {