$(function () {
	$('.switch-button, .switch-grip').on('click', function() {
		$(this).parents('.pedal').toggleClass('active');
	});
  var rotationSnap = 30;
  Draggable.create(".knob", {
      type:"rotation",
      throwProps:true,
      snap:function(endValue) {
        return Math.round(endValue / rotationSnap) * rotationSnap;
      }
  });
});