Mandolin m => dac;
400 => m.freq;
ModalBar b => dac;
900 => b.freq;

while (true) { // do forever
	Std.rand2f(0, 1)=> float f; //f is now a random number between 0 and 1
	if (f < .8) { //adjust threshold for different probabilities of playing m, b
		//currently, we have an 80% chance of playing mandolin
		m.noteOn(1.0);
	} else {
		b.noteOn(1.0);
	}	
	.1::second => now;
}