Guitarist Cristián Alvear was born in 1979 and lives in Santiago, Chile. Active on the international contemporary/experimental music scene, he has since 2010 released numerous recordings on labels in various countries. Musician and programmer Klaus Filip was born in 1963 and resides in Vienna, Austria. ppooll, the software he developed, is used regularly by many improvisers, including Filip himself.

This album is comprised of a single track of 40 min., 58 sec., divided into six parts. Klaus Filip continuously plays gentle-sounding sine tones, over which Cristián Alvear simply and steadily repeats the same chords and short phrases on acoustic guitar. While each of the six parts is different in form, the work as a whole is simple, clean-lined, and delicately refined, radiating an indefinably mysterious mood throughout. A masterpiece.