drone of Euphotic 1, Euphotic 2 and Diffuse Reflection came from pipe organ sounds which corey fuller have recorded for this project. and Chihei Hatakeyama slightly added electric guitar drone to these songs. These music have melodies by a harmonic overtone and a phase effect. naturally Disphotic is another session. corey fuller have played analog synthesizer "ms20". Chihei Hatakeyama have played electric guitar and Max/MSP.