diff --git a/plugin/ic29.cpp b/plugin/ic29.cpp
index d82e660..4d0de5e 100644
--- a/plugin/ic29.cpp
+++ b/plugin/ic29.cpp
@@ -20,3 +20,6 @@
 
 #include "peacock.hpp"
 
+void Synth::voiceOn(uint8_t voice, uint8_t note) {
+    // enable synth voice, start it all running
+}
diff --git a/plugin/ic29.hpp b/plugin/ic29.hpp
index d84a446..491f839 100644
--- a/plugin/ic29.hpp
+++ b/plugin/ic29.hpp
@@ -20,3 +20,23 @@
 
 #include "peacock.hpp"
 
+class Synth {
+   public:
+    Synth();
+    void voiceOn(uint8_t voice, uint8_t note);
+    void voiceOff(uint8_t voice);
+    void sustainSwitch(uint8_t val);
+    void pitchBend(int16_t bend);
+    void modWheel(uint8_t wheel);
+    uint16_t masterPitch;  // sum of bend and LFO, plus any other pitch-setting value
+   private:
+};
+
+class Voice {
+   public:
+   Voice();
+   void run();
+   private:
+
+
+};