diff --git a/src/engine/platform/msm5232.cpp b/src/engine/platform/msm5232.cpp
index 2bc3d8b6..39e9d08b 100644
--- a/src/engine/platform/msm5232.cpp
+++ b/src/engine/platform/msm5232.cpp
@@ -81,7 +81,7 @@ void DivPlatformMSM5232::tick(bool sysTick) {
     chan[i].std.next();
     if (chan[i].std.vol.had) {
       chan[i].outVol=VOL_SCALE_LOG(chan[i].vol&31,MIN(31,chan[i].std.vol.val),31);
-      // TODO: volume write?
+      // MSM5232 doesn't even have volume control :<
     }
     if (chan[i].std.arp.had) {
       if (!chan[i].inPorta) {
@@ -300,7 +300,8 @@ void DivPlatformMSM5232::notifyInsDeletion(void* ins) {
 
 void DivPlatformMSM5232::setFlags(const DivConfig& flags) {
   chipClock=2119040;
-  msm->set_clock(chipClock);
+  detune=flags.getInt("detune",0);
+  msm->set_clock(chipClock+detune*1024);
   rate=msm->get_rate();
   for (int i=0; i<8; i++) {
     oscBuf[i]->rate=rate;
diff --git a/src/engine/platform/msm5232.h b/src/engine/platform/msm5232.h
index 18964983..7bfe7950 100644
--- a/src/engine/platform/msm5232.h
+++ b/src/engine/platform/msm5232.h
@@ -63,7 +63,7 @@ class DivPlatformMSM5232: public DivDispatch {
   };
   std::queue<QueuedWrite> writes;
 
-  int cycles, curChan, delay;
+  int cycles, curChan, delay, detune;
   short temp[16];
   msm5232_device* msm;
   unsigned char regPool[128];
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 74c96271..960d0f9d 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -1290,6 +1290,20 @@ bool FurnaceGUI::drawSysConf(int chan, DivSystem type, DivConfig& flags, bool mo
 
       break;
     }
+    case DIV_SYSTEM_MSM5232: {
+      int detune=flags.getInt("detune",0);
+
+      if (CWSliderInt("Detune",&detune,-127,127)) {
+        if (detune<-127) detune=-127;
+        if (detune>127) detune=127;
+        altered=true;
+      } rightClickable
+
+      if (altered) {
+        flags.set("detune",detune);
+      }
+      break;
+    }
     case DIV_SYSTEM_SWAN:
     case DIV_SYSTEM_VERA:
     case DIV_SYSTEM_BUBSYS_WSG: