From ad55e6f7289ca6be9c570a66af6c90b9031c3039 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Tue, 17 Oct 2023 18:11:12 -0500
Subject: [PATCH] ES5506: fix getPan

---
 src/engine/platform/es5506.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/engine/platform/es5506.cpp b/src/engine/platform/es5506.cpp
index b93f0c163..64aca0be5 100644
--- a/src/engine/platform/es5506.cpp
+++ b/src/engine/platform/es5506.cpp
@@ -1057,7 +1057,11 @@ DivMacroInt* DivPlatformES5506::getChanMacroInt(int ch) {
 }
 
 unsigned short DivPlatformES5506::getPan(int ch) {
-  return ((chan[ch].lVol>>4)<<8)|(chan[ch].rVol>>4);
+  float expL=255.0f*pow(((float)(chan[ch].resLVol>>4))/4095.0f,4.0f);
+  float expR=255.0f*pow(((float)(chan[ch].resRVol>>4))/4095.0f,4.0f);
+  if (expL>255.0f) expL=255.0f;
+  if (expR>255.0f) expR=255.0f;
+  return (((unsigned int)expL)<<8)|((unsigned int)expR);
 }
 
 void DivPlatformES5506::reset() {