ntById("songname");

		// create canvas to display scope
		var scopeCanvas = document.createElement("canvas");
		var scopeWidth = scopeCanvas.width = 215;
		var scopeHeight = scopeCanvas.height = 34;
		var scope = scopeCanvas.getContext("2d");
		scopeCanvas.onclick = function(){
			scopeActive = !scopeActive;
			clearScope();
        };
		document.getElementById("scope").appendChild(scopeCanvas);

		var analyser = BassoonTracker.audio.context.createAnalyser();
		analyser.smoothingTimeConstant = 0.85;

		Bas