I am doing an Arduino project with the M5Core 2 and I want to play some tones o PCM sound, but without using a SD.

I only can play the DingDong that is done in a function of MStack library. But the function M.Ax.tone doesn't work.

Example: link text

#include <M5Stack.h>

void setup() {
M5.begin();
M5.Speaker.tone(900, 1000);
}

Thanks.
David.