From 583da7f6cfa9f2908f786ee393447ce0e872723a Mon Sep 17 00:00:00 2001
From: Hisymak <kozten@seznam.cz>
Date: Wed, 2 May 2018 20:11:58 +0200
Subject: [PATCH] OPL Synth fix: Double-voice instruments randomly don't play
 second voice

---
 src/sound/oplsynth/musicblock.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sound/oplsynth/musicblock.cpp b/src/sound/oplsynth/musicblock.cpp
index bbbf6f075..66c6b15a6 100644
--- a/src/sound/oplsynth/musicblock.cpp
+++ b/src/sound/oplsynth/musicblock.cpp
@@ -225,7 +225,7 @@ void musicBlock::noteOn(uint32_t channel, uint8_t key, int volume)
 		if (double_voice)
 		{
 			i = findFreeVoice();
-			if (i > 0)
+			if (i >= 0)
 			{
 				voiceKeyOn(i, channel, instrument, 1, key, volume);
 			}