try to use uBit.soundmotor sound functions

libs/core/music.cpp

@@ -0,0 +1,9 @@
+#include "ksbit.h"
+
+namespace music {
+    void playTone(int freqency, int ms) {
+        uBit.soundmotor.Sound_On(freqency);
+        if(ms > 0) uBit.sleep(ms);
+        uBit.soundmotor.Sound_Off();
+    }
+}

libs/core/music.ts

@@ -137,13 +137,13 @@ namespace music {
     //% help=music/play-tone weight=90
     //% blockId=device_play_note block="play|tone %note=device_note|for %duration=device_beat" icon="\uf025" blockGap=8
     //% parts="speaker"
-    export function playTone(frequency: number, ms: number): void {
-        // TODO check timing
-        pins.digitalWritePin(DigitalPin.P28, 1); // switch on the motor driver
-        pins.analogSetPitchPin(AnalogPin.P29);
-        pins.analogPitch(frequency, ms);
-        pins.digitalWritePin(DigitalPin.P28, 0); // switch off the motor driver
-    }
+    // export function playTone(frequency: number, ms: number): void {
+    //     // TODO check timing
+    //     pins.digitalWritePin(DigitalPin.P28, 1); // switch on the motor driver
+    //     pins.analogSetPitchPin(AnalogPin.P29);
+    //     pins.analogPitch(frequency, ms);
+    //     pins.digitalWritePin(DigitalPin.P28, 0); // switch off the motor driver
+    // }
 
     /**
      * Plays a tone through ``speaker``.

libs/core/pxt.json

@@ -23,6 +23,7 @@
         "led.cpp",
         "led.ts",
         "motors.cpp",
+        "music.cpp",
         "music.ts",
         "pins.cpp",
         "pins.ts",