var osc = T("pulse");

var env = T("perc", {a:50, r:2500});

var oscenv = T("OscGen", {osc:osc, env:env, mul:0.15}).play();

T("interval", {interval:500}, function(count) {

  var noteNum  = 69 + [0, 2, 4, 5, 7, 9, 11, 12][count % 8];

  var velocity = 64 + (count % 64);

  oscenv.noteOn(noteNum, velocity);

}).start();