diff --git a/src/FluidBufNMF/tests.scd b/src/FluidBufNMF/tests.scd
index 4d65163..8a096db 100644
--- a/src/FluidBufNMF/tests.scd
+++ b/src/FluidBufNMF/tests.scd
@@ -155,3 +155,17 @@ c.query
 c.play
 b.query
 b.play
+
+
+// nmf on empty buffer
+Buffer.freeAll;
+(
+Routine({
+	b = Buffer.alloc(s,44100);
+	c = Buffer.new(s);
+	s.sync;
+	FluidBufNMF.process(s,b.bufnum,dstBufNum:c.bufnum);
+	s.sync;
+	c.getn(0,100,{|x| x.postln});
+}).play;
+)
diff --git a/src/FluidSines/test.scd b/src/FluidSines/test.scd
index 3380f3c..d7a2acd 100644
--- a/src/FluidSines/test.scd
+++ b/src/FluidSines/test.scd
@@ -7,7 +7,7 @@ b.play
 {FluidSines.ar(PlayBuf.ar(1,b.bufnum,loop:1))}.play
 
 // sexier params
-{FluidSines.ar(PlayBuf.ar(1,b.bufnum,loop:1),windowSize:1024)}.play
+{FluidSines.ar(PlayBuf.ar(1,b.bufnum,loop:1),threshold:MouseX.kr())}.play
 
 // null test (the process add a latency of (( hopSize * minTrackLen) + windowSize) samples
-{var sig = PlayBuf.ar(1,b.bufnum,loop:1); [FluidSines.ar(sig).sum - DelayN.ar(sig, 1, ((( 512 * 15) + 2048)/ s.sampleRate))]}.play
\ No newline at end of file
+{var sig = PlayBuf.ar(1,b.bufnum,loop:1); [FluidSines.ar(sig).sum - DelayN.ar(sig, 1, ((( 512 * 15) + 2048)/ s.sampleRate))]}.play