Have found interesting free brainwave music.

http://brainwavechick.com/education/pages/music.html

Quote:

During our visit we all had the opportunity to make brain wave music. You can hear what our instruments sound like below. When we are asleep, our brain wave frequencies are predominantly in the delta frequency range. Delta music would be calm and peaceful sounding.

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MP3 Downloads: Brainwave Music

Quote:

What is It? Brainwave music refers to a process, whereby brainwave values, input to the computer via a Bluetooth peripheral, are converted to frequency and amplitude values using fast Fourier transforms. These values are analyzed with EEG in the IBVA software, which outputs signaling as biofeedback in frequency ranges of beta, alpha, theta, and delta. Neural data converted to MIDI and input to sound applications are played as software instruments making brainwave music. Multiple tracks of brainwave music are composed, edited, and output as brainwave music compositions. About Brainwave Chick The first performance of "Brainwave Chick" was a pre-concert installation at Sonic Circuits V which was held in Bettersworth Auditorium at Mississippi State University in 1998. Dr. Mark Applebaum named the collaborative brainwave music composition "That Brainwave Chick" and continued to collaborate with Kaul for several more brainwave music concerts.

http://www.brainwavechick.com/ftpsite/

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BRAINWAVE CHICK VI
Brainwave Animation and Sound

http://brainwavechick.com/pages/walkerss.html

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Brain Wave Music Score
"Love Not War", Movement 2 of PEACE STREAMS (9:05min)
Paras Kaul

http://brainwavechick.com/musicscores/

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Art and The Brain

http://www.studio360.org/yore/show032903.html