From 0805907f9130a9eb05b9c4a302756b8fad9258bb Mon Sep 17 00:00:00 2001
From: win2kgamer <47463859+win2kgamer@users.noreply.github.com>
Date: Sat, 7 Feb 2026 21:54:33 -0600
Subject: [PATCH] PSSJ: Bit 4 of port C7/1E7 is reserved and not used for
 amplitude

---
 src/sound/snd_pssj.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sound/snd_pssj.c b/src/sound/snd_pssj.c
index 7de8ec824..da141dafd 100644
--- a/src/sound/snd_pssj.c
+++ b/src/sound/snd_pssj.c
@@ -78,7 +78,7 @@ pssj_write(uint16_t port, uint8_t val, void *priv)
             break;
         case 3:
             pssj->freq      = (pssj->freq & 0x0ff) | ((val & 0xf) << 8);
-            pssj->amplitude = val >> 4;
+            pssj->amplitude = (val & 0xef) >> 4;
             break;
 
         default: