PITCH/RATE deck: Rate and Pitch knobs compounded into one read increment, on a three-state commit predicate and payload v16

src/core/instrument/engine/voice_engine.cpp

@@ -54,7 +54,11 @@ void VoiceEngine::applyLiveToActive() {
 
 void VoiceEngine::startVoice(Voice& voice, int note, int velocity) {
     refreshLive();
-    voice.start(note, velocity, sample_, /*declickTakeover=*/takeoverDeclick_);
+    // THE read of the note-on-latched commit class, and the only one: a published block outranks
+    // the snapshot's own copy (a live edit deliberately leaves that stale), and applyLive below
+    // never touches the rate — so a Rate move reaches the next note and no sounding one.
+    const double rate = haveLive_ ? live_.playRate : sample_.play.playRate;
+    voice.start(note, velocity, sample_, /*declickTakeover=*/takeoverDeclick_, rate);
     if (haveLive_) voice.applyLive(live_, /*snap=*/true);
     voice.setStartOrder(nextStartOrder_++);
 }