The Colundi Sequence is an alternative to the traditional 12-note scales we conventionally tune musical instruments to. “Colundi” is Music Tuned to Frequencies That Heal the Body « Bandcamp Daily For the last few years, Perälä has been using the Colundi Sequence to create a startling amount of music—bubbly, beatific post-rave tracks peppered with curious melodies and a general sense of cosmic optimism.