function sai = nota(n,t)
	fam = 8000;
	frq = 440*2.^(n/12);
	per = (0:1/fam:t);
	musica = [];
	for f = (1:length(frq))
		musica = [musica   sin(2*pi*per*frq(f))/2 .* exp(-per/(t/8))];
	end
	sound(musica,fam);