1 files changed, 10 insertions, 0 deletions
diff --git a/src/midi.c b/src/midi.c
index e711ecb..fbea43f 100644
--- a/src/midi.c
+++ b/src/midi.c
@@ -12,6 +12,8 @@ void midi_decode(uint32_t msg, synth_t * synth) {
   uint8_t channel = (status & 0x0F) + 1; // convert to human
   uint8_t message = status >> 4;
 
+  int flag = 1;
+
   switch (message) {
     case 0x08:
       printf("Note Off: channel=%d, note=%d, velocity=%d\n", channel, data1, data2);
@@ -28,6 +30,14 @@ void midi_decode(uint32_t msg, synth_t * synth) {
       synth->midi_note[data1].velocity = (float)data2 / 127.0;
       synth->midi_note[data1].elapsed = 0;
       synth->midi_note[data1].active = 1;
+      for (int i = 0; i < synth->midi_active_n; i++) {
+        if (synth->midi_active[i] == &synth->midi_note[data1]) {
+          flag = 0;
+        }
+      }
+      if (flag) {
+        synth->midi_active[synth->midi_active_n++] = &synth->midi_note[data1];
+      }
       synth->active = 1;
       break;
     case 0x0A: