Xenharmonic music

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Microtonal or/and macrotonal music fan club. Sharing new music, ideas, papers, instruments and other stuff related to the topic. If you're not familiar with the terms please read first: https://en.wikipedia.org/wiki/Xenharmonic_music25 Servers

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14 Feb 2021
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15 Feb 2021
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16 Feb 2021
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24 Feb 2021
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25 Feb 2021

Sevish — Some Things Must Reprise

22edo ambient


27 Feb 2021
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11 Mar 2021

Sevish — You Tell Me

just Intonation (JI)


22 Mar 2021

Brendan Byrnes — Microtonal Guitar — 27 Equal Divisions of the Octave


@twily:pony.modular.imTwily☝️ 👇️01:53:11
@twily:pony.modular.imTwilyDownload Microtonal Guitar - 27 Equal Divisions of the Octave.mp401:53:42
25 Mar 2021

Sevish — Plot Hole

22 tone JI

Track one from the album Bubble [2021], atmospheric drum and bass: https://sevish.bandcamp.com/album/bubble​

The scale used here is an approximation of 22edo using select harmonics between 128-256. All intervals are therefore some number over 128 and the scale is near-equal. In a sense all notes in the scales are related to some very low fundamental frequency. This 'justifies' the sound of the tuning somewhat but also allows for free modulation like you would expect from an equal scale.

The idea to experiment with this kind of tuning came from the short story A Bit O' Blarney by George Secor. But these days the idea is being popularised by Zhea Erose and various members of the Xenharmonic Alliance Discord.

From 0:58​ the 4 chord progression modulates up by a minor 3rd (6\22) each repetition. In 12edo, this progression would return to its original key after 4 modulations, but in quasi-22edo (and 22edo) you end up in a key a semitone higher than where you started. That's because the minor 3rd is tuned wider, so the difference starts to really accumulate as you stack the same interval repeatedly.


17 Apr 2021

Sevish — Almighty Fractal

Just Intonation (JI) ambient

Lofi ambient from my album Bubble [2021]: https://sevish.bandcamp.com/album/bubble​

Almighty Fractal uses a tetrachordal scale (same as 'The Entity Unmasked', see Scale Workshop link below). It is mostly one improvised take with overdubs. A nice property of small 'modal' sounding scales is that you can just jam and improvise easily. I intend to explore this approach more in some of my future music.

Fractal animation done with Mandelbulber plus Kdenlive. Sorry that youtube compression mushes it - I can't help but have fast moving details in my fractal vids. Maybe I should upload the full resolution versions some time.


19 Apr 2021

Brendan Byrnes — Microtonal Guitar Etude and Demonstration — 27 EDO

This is a short piece for a guitar fretted to 27 Equal Divisions of the Octave (27EDO) and an informal demonstration of some of the interesting chords and intervals in this tuning system. The guitar was refretted by Metatonal Music.


24 Apr 2021
@tm512:matrix.orgtm512I don't think I've really heard much 27edo before. sounds pretty interesting21:13:19
27 Apr 2021

BeeBoard MIDI Keyboard — Free flow in 22EDO with Surge VST synth


@twily:pony.modular.imTwily☝️ 👇️13:43:37
@twily:pony.modular.imTwilyDownload Free flow in 22EDO with Surge vst synt.mp413:44:05
30 Apr 2021

Brendan Byrnes — 2227 [LP] (only pre-order yet)

A preview clips set of all tracks and one full track are released. The full album releases May 28, 2021.

“xenharmonic music uses tuning systems that neither conform or approximate the common 12-tone equal temperament”

This music uses 22 and 27 equal divisions per octave (EDO) tuning systems. Custom fretted guitars by Metatonal Music and retuned synthesizers made possible by H-PI Instruments.


4 May 2021
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8 May 2021

Sevish — Dream Up (Demo Version)



An early DEMO version of Dream Up that I thought would be interesting to share. Faster tempo. Brighter tuning. Different sound designs. Less finesse overall.

The tuning is 140., 200., 310., 400., 540., 640., 700., 833., 900., 1040., 1100., 1200.

9 May 2021
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10 May 2021
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11 May 2021
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