diff --git a/a_lot_of_tiles_trivial_scan_score.pdf b/a_lot_of_tiles_trivial_scan_score.pdf
index 139c33d..09c6feb 100644
Binary files a/a_lot_of_tiles_trivial_scan_score.pdf and b/a_lot_of_tiles_trivial_scan_score.pdf differ
diff --git a/supercollider/a_lot_of_tiles_trivial_scan_gui.scd b/supercollider/a_lot_of_tiles_trivial_scan_gui.scd
index aad502a..1ac3d68 100644
--- a/supercollider/a_lot_of_tiles_trivial_scan_gui.scd
+++ b/supercollider/a_lot_of_tiles_trivial_scan_gui.scd
@@ -120,8 +120,8 @@ transportView = {
 	// update clock and metronome
 	clockStringFunc = {
 		arg curBeat; var measure, beat;
-		beat = (((curBeat / 2) % 4) + 1).trunc.asString;
-		measure = ((curBeat / 8) + 1).trunc.asString;
+		beat = (((curBeat / 2) % 4) + 1).trunc.asInteger.asString;
+		measure = ((curBeat / 8) + 1).trunc.asInteger.asString;
 		if(measure.size == 1, {measure = "  " ++ measure});
 		if(measure.size == 2, {measure = " " ++ measure});
 		measure ++ ":" ++ beat};
@@ -164,9 +164,10 @@ transportView = {
 				if(File.exists(baseDir +/+ "hl_6_fundamental.wav").not ||
 						File.exists(baseDir +/+ "hl_6_harmonics.wav").not ||
 						File.exists(baseDir +/+ "hl_5_high_noise.wav").not ||
-						File.exists(baseDir +/+ "hl_4_low_noise.wav").not, {
+						File.exists(baseDir +/+ "hl_4_low_noise.wav").not ||
+					    File.exists(baseDir +/+ "click.wav").not, {
 							var matrixH4, matrixH5, matrixH6, dataH4, dataH5, dataH6,
-							patternH4, patternH5, patternH6Fund, patternH6Harms;
+							patternH4, patternH5, patternH6Fund, patternH6Harms, click;
 							matrixH4 = ~matricize.value([~tileMap[4]], 4, 0, ~transform);
 							matrixH5 = ~matricize.value([~tileMap[5]], 5, 0, ~transform);
 							matrixH6 = ~matricize.value([~tileMap[6]], 6, 0, ~transform);
@@ -176,7 +177,8 @@ transportView = {
 							patternH4 = ~genPattern.value(dataH4, "hl_4_low_noise", 16, true, cond); cond.hang;
 							patternH5 = ~genPattern.value(dataH5, "hl_5_high_noise", 4, true, cond); cond.hang;
 							patternH6Fund = ~genPattern.value([dataH6[0]], "hl_6_fundamental", 1, true, cond); cond.hang;
-							patternH6Harms = ~genPattern.value(dataH6[1..3], "hl_6_harmonics", 1, true, cond); cond.hang});
+							patternH6Harms = ~genPattern.value(dataH6[1..3], "hl_6_harmonics", 1, true, cond); cond.hang;
+						    click = ~genPattern.value([(0..7).wrapExtend(8 * 129)], "click", 2, true, cond); cond.hang});
 
 				// load buffers if the transform has changed
 				if(~loadedTransform != ~transform, {var baseDir;
@@ -190,7 +192,7 @@ transportView = {
 
 				// play / stop functionality (create synth if it does not exist
 				{if(~play == nil, {~play = Synth.new(\play, [\hash, hash, \playRate, 0, \startTrig, 0,
-						\sineBuf1, ~buf1, \sineBuf2, ~buf2, \highNoiseBuf, ~buf3, \lowNoiseBuf, ~buf4])});
+						\sineBuf1, ~buf1, \sineBuf2, ~buf2, \highNoiseBuf, ~buf3, \lowNoiseBuf, ~buf4, \tempo, ~tempo])});
 					pauseButton.value = 0;
 					if(elem.value == 0, {
 						clock.string = clockStringFunc.value((startPos * 129).trunc * 8);
diff --git a/supercollider/a_lot_of_tiles_trivial_scan_main.scd b/supercollider/a_lot_of_tiles_trivial_scan_main.scd
index 6d7b52c..5e25f13 100644
--- a/supercollider/a_lot_of_tiles_trivial_scan_main.scd
+++ b/supercollider/a_lot_of_tiles_trivial_scan_main.scd
@@ -21,7 +21,8 @@ appEnvironment.push;
 ~transform = [2, 1, 0, 1, 0, 0, 0];
 ~tileMap = ~mapAll.value(6 /*max depth*/, ~transform);
 ~layoutState = 0;
-~dur = 0.125;
+~tempo = 120;
+~dur = 0.125 * (120/~tempo);
 ~continuousPlay = false;
 
 // launch
diff --git a/supercollider/a_lot_of_tiles_trivial_scan_sonifier.scd b/supercollider/a_lot_of_tiles_trivial_scan_sonifier.scd
index d92660f..326a6a7 100644
--- a/supercollider/a_lot_of_tiles_trivial_scan_sonifier.scd
+++ b/supercollider/a_lot_of_tiles_trivial_scan_sonifier.scd
@@ -14,6 +14,13 @@ SynthDef(\hl_4_low_noise, {arg amp = 1, pos = 0;
 	Out.ar(0,  Pan2.ar(LPF.ar(WhiteNoise.ar(Lag.kr(amp * (1 / 4), 0.05)), 300), pos))
 }).store;
 
+// synth for click (only generates files for practice purposes)
+SynthDef(\click, {arg tick;
+	Out.ar([0, 1], 10 * BPF.ar(
+		WhiteNoise.ar * EnvGen.kr(Env.perc(0.01, 0.1), tick % 2 <= 0),
+		440 * ((tick % 8 <= 0) + 1), 0.02))
+}).store;
+
 // synth for amp curves for score
 SynthDef(\lamp, {arg freq, amp = 1;
 	Out.ar(0, Lag.ar(K2A.ar(amp), 2))
@@ -24,14 +31,14 @@ SynthDef(\play, {arg sinePlayer1, sinePlayer2, highNoisePlayer, lowNoisePlayer,
 	sineBuf1 = 0, sineBuf2 = 1, highNoiseBuf = 2, lowNoiseBuf = 3,
 	eTracks, eTracksPanned, eMaster,
 	eVol = #[0.8, 0.8, 0.8, 0.8], eMute = #[1, 1, 1, 1], ePan = #[0, 0, 0, 0], masterVol = 1, masterMute = 1,
-	playRate = 0, startPos = 0, startTrig = 0, hash;
+	playRate = 0, startPos = 0, startTrig = 0, hash, tempo;
 	var dStartTrig, phasor, countOff, imp, curBeat;
 
-	countOff = PulseCount.kr(Impulse.kr(4), startTrig) * startTrig;
+	countOff = PulseCount.kr(Impulse.kr(4 * (tempo/120)), startTrig) * startTrig;
 	dStartTrig = countOff > 17;
 	phasor = Phasor.ar(dStartTrig, Select.kr(playRate * dStartTrig, [0, BufRateScale.kr(sineBuf1)]),
 		0, BufFrames.kr(sineBuf1), startPos * BufFrames.kr(sineBuf1));
-	curBeat = ((A2K.kr(phasor) / BufFrames.kr(sineBuf1)) * BufDur.kr(sineBuf1) * 4).trunc;
+	curBeat = ((A2K.kr(phasor) / BufFrames.kr(sineBuf1)) * BufDur.kr(sineBuf1) * 4 * (tempo/120)).trunc;
 	curBeat = Select.kr(dStartTrig, [countOff - 18, curBeat]);
 
 	sinePlayer1 = PlayBuf.ar(2, sineBuf1, playRate * dStartTrig, dStartTrig, startPos * BufFrames.kr(sineBuf1));
@@ -46,7 +53,7 @@ SynthDef(\play, {arg sinePlayer1, sinePlayer2, highNoisePlayer, lowNoisePlayer,
 	Out.ar(0, eMaster);
 
 	// optional click - uncomment and send to an output not used
-	//Out.ar(2, 10 * BPF.ar(WhiteNoise.ar * EnvGen.kr(Env.perc(0.01, 0.1), curBeat % 2 <= 0), 440 * ((curBeat % 8 <= 0) + 1), 0.02));
+	// Out.ar(1, 10 * BPF.ar(WhiteNoise.ar * EnvGen.kr(Env.perc(0.01, 0.1), curBeat % 2 <= 0), 440 * ((curBeat % 8 <= 0) + 1), 0.02));
 	SendTrig.kr(Changed.kr(curBeat), hash, curBeat);
 	imp = Impulse.kr(10);
 	SendReply.kr(imp, '/masterLevel', [Amplitude.kr(eMaster)], hash);
@@ -63,7 +70,8 @@ SynthDef(\play, {arg sinePlayer1, sinePlayer2, highNoisePlayer, lowNoisePlayer,
 			"hl_6_harmonics", {Pmono(\hl_6_sine, \freq, 31.midicps + ((31.midicps * 4) * (p + 1)),
 				\dur, ~dur, \amp, Pseq(seq * (1 / pow(1 + ((p + 1) * 4), 1))), \pos, 0)},
 			"hl_5_high_noise", {Pmono(\hl_5_high_noise, \dur, ~dur * durMult, \amp, Pseq(seq), \pos, 0)},
-			"hl_4_low_noise", {Pmono(\hl_4_low_noise, \dur, ~dur * durMult, \amp, Pseq(seq), \pos, 0)})}));
+			"hl_4_low_noise", {Pmono(\hl_4_low_noise, \dur, ~dur * durMult, \amp, Pseq(seq), \pos, 0)},
+			"click", {Pmono(\click, \tick, Pseq(seq), \dur, ~dur * durMult)})}));
 	if(genAudio, {File.mkdir(~dir +/+ ".." +/+ "audio" +/+ "transform_" ++ ~transform.join ++ "_audio");
 		pattern.render(~dir +/+ ".." +/+ "audio" +/+ "transform_" ++ ~transform.join ++ "_audio" +/+ ins ++ ".wav", ~dur * durMult * data[0].size,
 			headerFormat: "WAV", sampleRate: s.sampleRate, action: {if(cond != nil, {cond.unhang})})});