http://en.wikipedia.org/wiki/Fast_Fourier_transform#Cooley.E2.80.93Tukey_algorithm
http://www.fftw.org/links.html
http://www.anyexample.com/programming/java/java_play_wav_sound_file.xml
http://tuxguitar.herac.com.ar/
http://ubuntuforums.org/showthread.php?t=8736
https://help.ubuntu.com/community/Midi/SoftwareSynthesisHowTo
https://help.ubuntu.com/community/HowToQjackCtlConnectionsv
http://guitar.about.com/library/weekly/aa071200j.htm