NOTE: 
--> start this piece with your volume all the way down, and ramp up gradually to desired level.

Breathalyzer
	•	for 5 laptops + 5 humans + no additional amplification (a Small Sounds Sketch).
	•	composer: Matt Hoffman
	•	duration: ~3'
	•	software used: ChucK

Program Notes
This piece explores the potential of the built-in Apple PowerBook microphone as an expressive performance interface. Performers blow into the microphone in an attempt to control the stochastically oscillating center frequency with which a bandpass filter is applied to noise. As more "breath" is put into the laptop, the bandwidth of the filter expands, until only white noise is left.

Laptop Instructions
	•	set volume to about 1/2 maximum to avoid excessive feedback
	•	ensure input is set to internal mic, output to internal speakers
	•	make sure nothing is plugged into the headphone jack

Files
	•	files: upper.ck, downer.ck, conductor.ck

Human Instructions
performers
	•	(ahead of time) performers are designated as either uppers or downers
uppers
	•	The center frequency of your filter wants to go down - you must keep it up.
downers
	•	The center frequency of your filter wants to go up - you must keep it down.
conductor
	•	Your center frequency does whatever it wants - you can only make it do so faster.
all
	•	start upper.ck, downer.ck, or conductor.ck
	•	blow into microphone until you're happy with where your filter is
	•	wait until you're no longer happy/have caught your breath
	•	repeat until you have no real control over the sound of your laptop
	•	slowly ratchet volume down