From fb1f9aad6e2190d43c583ccba8495056d41a1156 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Wed, 5 Mar 2014 00:30:23 -0800
Subject: Expand the sign bit on the initial MSADPCM delta value

---
 OpenAL32/alBuffer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/OpenAL32/alBuffer.c b/OpenAL32/alBuffer.c
index 8f19ae0a..b9d3cd6d 100644
--- a/OpenAL32/alBuffer.c
+++ b/OpenAL32/alBuffer.c
@@ -1311,6 +1311,7 @@ static void DecodeMSADPCMBlock(ALshort *dst, const ALmsadpcm *src, ALint numchan
     {
         delta[i]  = *(src++);
         delta[i] |= *(src++) << 8;
+        delta[i]  = (delta[i]^0x8000) - 0x8000;
     }
     for(i = 0;i < numchans;i++)
     {
-- 
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