(
10.do { |i|
	Speech.setSpeechVoice(i, i+10);
};
)

f = {|chan=0|
	"goodbye world".speak(chan);
}


f = {|chan=0, end=10|
	"goodbye world".speak(chan);
	0.3.wait;
	if(chan < end) { 
		f.value(chan + 1, end)
	};
}

Routine { f.value(3, 9) }.play;