From a1b6a8d053ba69d0b48787e7b48885b717e7e2f1 Mon Sep 17 00:00:00 2001
From: Olivier Galibert <galibert@pobox.com>
Date: Wed, 8 Nov 2023 01:11:35 +0100
Subject: [PATCH] swp00: Correct the level of the decompressed samples

---
 src/devices/sound/swp00.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/devices/sound/swp00.cpp b/src/devices/sound/swp00.cpp
index db9277b592c..830baba8e0a 100644
--- a/src/devices/sound/swp00.cpp
+++ b/src/devices/sound/swp00.cpp
@@ -359,7 +359,7 @@ void swp00_device::device_start()
 	// Delta-packed samples decompression.
 
 	for(int i=0; i<128; i++) {
-		s16 base = ((i & 0x1f) << (7+(i >> 5))) + (((1 << (i >> 5))-1) << 12);
+		s16 base = ((i & 0x1f) << (5+(i >> 5))) + (((1 << (i >> 5))-1) << 10);
 		m_dpcm[i | 0x80] = - base;
 		m_dpcm[i]        = + base;
 	}