diff --git a/algoforte01.scd b/algoforte01.scd
index 3790181..602baa2 100644
--- a/algoforte01.scd
+++ b/algoforte01.scd
@@ -41,7 +41,7 @@ m = MIDIOut(0)
 m.connect
 
 // test
-Pbindef(\testmidi, \type, \midi, \midicmd, \noteOn, \midiout, m, \chan, 1, \amp, 0.5).play
+Pbindef(\testmidi, \type, \midi, \midicmd, \noteOn, \midiout, m, \chan, 0, \amp, 0.5).play
 Pbindef(\testmidi).stop
 
 // processing input from piano
@@ -67,7 +67,7 @@ Ndef(\inDSPout).stop
 
 
 (
-Pbindef(\p220105b, \type, \midi, \midicmd, \noteOn, \midiout, m, \chan, 1,
+Pbindef(\p220105b, \type, \midi, \midicmd, \noteOn, \midiout, m, \chan, 0,
 	\dur, Pseq([
 		Pn(1/2, 50),
 		Pseq([1, 1/2, Pn(1/4,4), 2], 20), // 7*20