From 6fc4577f102e5bb60cc246a426fb9ed8b4ac3be9 Mon Sep 17 00:00:00 2001
From: Lukas W <lukaswhl@gmail.com>
Date: Tue, 17 Oct 2017 20:24:19 +0200
Subject: [PATCH] PlayHandle: Zero out buffer before processing

Fixes buffer noises when instruments don't write the whole buffer, such as
bitinvader. Related:
* #3884 (comment): https://github.com/LMMS/lmms/pull/3884#issuecomment-337170598
* #3883
# #3383
---
 src/core/PlayHandle.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/PlayHandle.cpp b/src/core/PlayHandle.cpp
index 5481ea3e2..9e92019a6 100644
--- a/src/core/PlayHandle.cpp
+++ b/src/core/PlayHandle.cpp
@@ -54,6 +54,7 @@ void PlayHandle::doProcessing()
 	if( m_usesBuffer )
 	{
 		m_bufferReleased = false;
+		BufferManager::clear(m_playHandleBuffer, Engine::mixer()->framesPerPeriod());
 		play( buffer() );
 	}
 	else