First, the link of Condenser Microphone, what I tried last semester refers to ITP website ...
Condenser Microphone
This semester, I will try this circuit-info by liubo_thanks!
Hardware
http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/
transistor 2N3904 _really any small NPN transistor with Vebo ~ 5V will work
2 capacitors 0.1u _1u stands for 0.1 microFarads, the u is a ยต symbol electret microphone
other site
http://itp.nyu.edu/~mfm317/physcomp/midterm.html
Software
Ess
max/msp/jitter
