From c04e43702cb516d87ee88b4d77dc1e1946c8185b Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Tue, 23 Nov 2021 18:47:54 +0100
Subject: SPU: correctly read negative ADPCM initial values. fixes #1261

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

(limited to 'src')

diff --git a/src/SPU.cpp b/src/SPU.cpp
index 3cd3a66..8ae437e 100644
--- a/src/SPU.cpp
+++ b/src/SPU.cpp
@@ -394,7 +394,7 @@ void Channel::NextSample_ADPCM()
         {
             // setup ADPCM
             u32 header = FIFO_ReadData<u32>();
-            ADPCMVal = header & 0xFFFF;
+            ADPCMVal = (s32)(s16)(header & 0xFFFF);
             ADPCMIndex = (header >> 16) & 0x7F;
             if (ADPCMIndex > 88) ADPCMIndex = 88;
 
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