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Igliashon Perplextus Jones, also known as Jason Yerger and Chuckles McGee, is a guitarist and composer living in Portland, Oregon. Born in 1982 in San Mateo, California, he has been studying microtonality since 2003. He has released numerous albums of microtonal music in a wide variety of tunings, under several aliases, mostly equal divisions of the octave. He has been an active (if controversial) participant in the online xenharmonic community for many years, dating back to the Alternate Tunings Yahoo group (aka "the Tuning List"). He currently plays guitar in the 17edo progressive rock band The Mercury Tree.

Approach to Xenharmonics

While Igliashon favors equal divisions of the octave, he is an enthusiast of all forms of microtonal theory, including regular temperament theory and Just Intonation. He subscribes to the belief that there is no single best tuning or approach to tuning, and encourages collaboration between those with diverse views and backgrounds. Igliashon is primarily a guitar player who dabbles in composition for electronic media. He currently owns guitars in 13edo, 14edo, 15edo, 17edo, 21edo, and 23edo. He has owned guitars in 16edo, 18edo, 19edo, 20edo, 22edo, and 31edo in the past, and has recorded and released music using each and every one.

As a theorist, Igliashon's main area of interest has been on JI subgroups of the 17-limit, and temperaments thereof, as applied to equal divisions of the octave below 24edo. His research has focused especially on EDOs normally considered to be too dissonant to be useful for harmonic music, such as 8edo, 10edo, 13edo, and 23edo. By applying the principles of regularly-tempered subgroup harmony, Igliashon has found consonant triads, tetrads, and pentads in all of the EDOs below 24, and has contributed much to the wiki articles on those tunings.


Active aliases:

  • Cryptic Ruse - mostly xenharmonic progressive instrumental metal and drone metal
  • City of the Asleep - mostly xenharmonic instrumental post rock, surf rock, electronica, glitch, and experimental progressive rock
  • Pixel Archipelago - xenharmonic ambient music
  • Perplextus Joans - non-microtonal post-punk and post-industrial music, with vocals

Microtonal Discography

As Cryptic Ruse:

  • ASMR - drone/doom/post-metal in 23edo, 15edo, and 13edo
  • Pineal Algebra - instrumental progressive metal in 14edo, 15edo, 17edo, and 23edo
  • Wasting and Thirsting - drone metal in 14edo, 17edo, and 23edo
  • Chains of Smoke - instrumental progressive metal in 13edo, 15edo, and 23edo
  • Misc 2003-2014- instrumental progressive metal in 10edo, 15edo, 22edo, and 31edo

As City of the Asleep:

  • CLOIIDS - instrumental progressive post rock in 10edo, 13edo, 14edo, 16edo, and 19edo
  • Transfinity - instrumental progressive post rock/experimental/kraut rock in 23edo
  • Transcendissonance - electronica in a variety of maximally-discordant tunings
  • Winter in Tumultua - experimental post rock/ambient/electronica in 17edo
  • Open Space - post rock/surf rock in 8edo, 9edo, 10edo, 16edo, 17edo,18edo, and 20edo
  • Map of an Internal Landscape - retro electronica in EDOs 9 through 28, omitting 12 and 24.
  • Early Microtonal Works - instrumental rock, post rock, and experimental music in 17edo, 22edo, 31edo, and 13-limit JI

As Pixel Archipelago:

  • Flower and Water - ambient music in various tunings, including 14edo and 72edo; some 12edo as well
  • Anhedonia - ambient music in various tunings, including 15edo, 16edo, 23edo, 72edo, and random freely-modulated intonation; some 12edo as well
  • ...to Dwell in the Realm of Limitless Possibilities - ambient music in various tunings, including 24edo, 36edo, 72edo, random intonation, and 13-limit JI; some 12edo as well
  • Live Forever in the Void of Space - ambient and dark ambient music in various tunings, including 13edo, 15edo, 23edo, and 13-limit JI; some 12edo as well