diff --git a/test/overlay.scd b/test/overlay.scd
new file mode 100644
index 0000000..18ab385
--- /dev/null
+++ b/test/overlay.scd
@@ -0,0 +1,72 @@
+(
+s.waitForBoot{
+	//var audio = Buffer.readChannel(s,FluidFilesPath("Tremblay-CEL-GlitchyMusicBoxMelo.wav"),channels:[0]);
+	// var audio = Buffer.readChannel(s,FluidFilesPath("Nicol-LoopE-M.wav"),channels:[0]);
+	 var audio = Buffer.readChannel(s,FluidFilesPath("Harker-DS-TenOboeMultiphonics-M.wav"),channels:[0]);
+
+	var window = Window(bounds:Rect(0,0,1600,400));
+	var mels = Buffer(s);
+	var mags = Buffer(s);
+	var chroma = Buffer(s);
+	var mfccs = Buffer(s);
+	var addLayer = {
+		arg win, imageBuffer, color, imageAlpha, colorScaling;
+		imageBuffer.loadToFloatArray(action:{
+			arg vals;
+			fork({
+				var colors = CSVFileReader.readInterpret(FluidFilesPath("../Resources/color-schemes/%.csv".format(color))).collect{
+					arg row;
+					Color.fromArray(row);
+				};
+				var img = Image(imageBuffer.numFrames,imageBuffer.numChannels);
+
+				colorScaling.switch(
+					0,{
+						var minItem = vals.minItem;
+						vals = (vals - minItem) / (vals.maxItem - minItem);
+						vals = (vals * 255).asInteger;
+					},
+					1,{
+						vals = (vals + 1e-6).log;
+						vals = vals.linlin(vals.minItem,vals.maxItem,0.0,255.0).asInteger;
+						// vals.postln;
+					},
+					{
+						"% colorScaling argument % is invalid.".format(thisMethod,colorScaling).warn;
+					}
+				);
+
+				vals.do{
+					arg val, index;
+/*					img.postln;
+					index.postln;
+					val.postln;*/
+					img.setColor(colors[val], index.div(imageBuffer.numChannels), imageBuffer.numChannels - 1 - index.mod(imageBuffer.numChannels));
+				};
+
+				UserView(win,Rect(0,0,win.bounds.width,win.bounds.height))
+				.drawFunc_{
+					img.drawInRect(Rect(0,0,win.bounds.width,win.bounds.height),fraction:imageAlpha);
+				};
+			},AppClock)
+		});
+	};
+
+	FluidBufMelBands.processBlocking(s,audio,features:mels);
+	FluidBufSTFT.processBlocking(s,audio,magnitude:mags);
+	FluidBufChroma.processBlocking(s,audio,features:chroma);
+	FluidBufMFCC.processBlocking(s,audio,features:mfccs);
+
+	s.sync;
+
+	"analysis done".postln;
+
+	// addLayer.(window,imageBuffer:mags,color:"CET-L02",imageAlpha:0.7,colorScaling:1);
+	addLayer.(window,imageBuffer:mels,color:"CET-L02",imageAlpha:1,colorScaling:1);
+
+	// addLayer.(window,imageBuffer:chroma,color:"CET-L16",imageAlpha:0.5,colorScaling:1);
+	addLayer.(window,imageBuffer:mfccs,color:"CET-L16",imageAlpha:0.3,colorScaling:0);
+
+	window.front;
+};
+)
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