diff --git a/r65emu.h b/r65emu.h
index b66a853..c2e50d2 100644
--- a/r65emu.h
+++ b/r65emu.h
@@ -17,6 +17,5 @@
 #include "timed.h"
 #include "hardware.h"
 #include "sound_dac.h"
-#include "sound_pwm.h"
 
 #endif
diff --git a/sound_pwm.cpp b/sound_pwm.cpp
deleted file mode 100644
index de4c2f5..0000000
--- a/sound_pwm.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-#include <Arduino.h>
-#include "sound_pwm.h"
-
-static unsigned gpio;
-
-void PWM::begin(unsigned gpio) {
-	::gpio = gpio;
-}
-
-void PWM::stop() {
-	noTone(gpio);
-}
-
-void PWM::start(unsigned freq) {
-	tone(gpio, freq);
-}
diff --git a/sound_pwm.h b/sound_pwm.h
deleted file mode 100644
index 89e5609..0000000
--- a/sound_pwm.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef __SOUND_PWM_H__
-#define __SOUND_PWM_H__
-
-class PWM {
-public:
-	void begin(unsigned gpio);
-	void stop();
-	void start(unsigned freq);
-};
-
-#endif