1 files changed, 7 insertions, 0 deletions
diff --git a/src/i_oplmusic.c b/src/i_oplmusic.c
index 51a609d9..ab64505c 100644
--- a/src/i_oplmusic.c
+++ b/src/i_oplmusic.c
@@ -445,6 +445,13 @@ static void SetVoiceInstrument(opl_voice_t *voice, genmidi_instr_t *instr)
     genmidi_voice_t *data;
     unsigned int modulating;
 
+    // Instrument already set for this channel?
+
+    if (voice->current_instr == instr)
+    {
+        return;
+    }
+
     voice->current_instr = instr;
     data = &instr->opl2_voice;