Playing a sound from a generated buffer in a Windows phone app -

Playing a sound from a generated buffer in a Windows phone app -

i new in windows phone sdk. can't find illustration of playing sound generated buffer in windows phone app. help pls.

i found example:

byte] buffer = new byte[44100 * 2 * 5]; float t = 0; (int = 0; < 44100 * 2 * 5; += 2) { short val = (short)(math.sin(t * 2 * math.pi * 440) * short.maxvalue); buffer[i] = (byte)(val & 0xff); buffer[i + 1] = (byte)(val >> 8); t += 1 / 44100.0f; } sf = new soundeffect(buffer, 44100, audiochannels.mono); // play. sf.play();

but it's crash error first chance exception of type 'system.invalidoperationexception' occurred in microsoft.xna.framework.ni.dll exception of type 'system.invalidoperationexception' occurred in microsoft.xna.framework.ni.dll not handled in user code

you need phone call frameworkdispatcher.update.

(see exception: frameworkdispatcher.update has not been called. regular frameworkdispatcher.update calls necessary fire , forget sound effects , framework events function correctly. see http://go.microsoft.com/fwlink/?linkid=193853 details.)

set timer in constructor:

var dt = new dispatchertimer(); dt.interval = timespan.frommilliseconds(33); dt.tick += new eventhandler(tick); dt.start();

and tick event handler:

void tick(object sender, eventargs e) { seek { frameworkdispatcher.update(); } grab (exception ex) { if (debugger.isattached) { debugger.break(); } } }

should work illustration play button in app. have added 1 line code: var soundinstance = sf.createinstance();

private void appbarplaybutton_click(object sender, eventargs e) { byte[] buffer = new byte[44100 * 2 * 5]; float t = 0; (int = 0; < 44100 * 2 * 5; += 2) { short val = (short)(math.sin(t * 2 * math.pi * 440) * short.maxvalue); buffer[i] = (byte)(val & 0xff); buffer[i + 1] = (byte)(val >> 8); t += 1 / 44100.0f; } var sf = new soundeffect(buffer, 44100, audiochannels.mono); var soundinstance = sf.createinstance(); // play. sf.play(); }

windows windows-phone-8 sdk