Properly handle a mono output buffer with the MIDI synths

1 files changed, 1 insertions, 1 deletions

diff --git a/Alc/ALu.c b/Alc/ALu.c
index cd23057c..2e94ad63 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -1219,7 +1219,7 @@ ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size)
         }
 
         V0(device->Backend,lock)();
-        V(device->Synth,process)(SamplesToDo, OutBuffer);
+        V(device->Synth,process)(SamplesToDo, OutBuffer, OutChannels);
 
         ctx = ATOMIC_LOAD(&device->ContextList);
         while(ctx)