diff --git a/src/engine/platform/sms.cpp b/src/engine/platform/sms.cpp
index f16d53351..28462027d 100644
--- a/src/engine/platform/sms.cpp
+++ b/src/engine/platform/sms.cpp
@@ -133,7 +133,7 @@ void DivPlatformSMS::tick(bool sysTick) {
     if (i==3) CHIP_DIVIDER=noiseDivider;
     chan[i].std.next();
     if (chan[i].std.vol.had) {
-      chan[i].outVol=MIN(15,chan[i].std.vol.val)-(15-(chan[i].vol&15));
+      chan[i].outVol=VOL_SCALE_LOG(chan[i].std.vol.val,chan[i].vol,15);
       if (chan[i].outVol<0) chan[i].outVol=0;
       // old formula
       // ((chan[i].vol&15)*MIN(15,chan[i].std.vol.val))>>4;