Alois Hába: "Suite for 4 Trombones in 1/4-Tone-System", op. 72 (1950): 1st mvt.

"Suite für 4 Posaunen im Vierteltonsystem", 2 Versions:

0:00 -- 24-ED2 corrected for Just-Intonation
2:06 -- 24-ED2 (equal)
Also check out my "Simple Piece" for Wind Quintet in 1/4-Tones (22 note equal temperament):    • Costa: "Simple Piece" for Wind Quintet - 1...  
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Czech composer Alois Haba explored microtonality intensively in a large part of his output, of which much remains yet to be heard.

I chose this short movement to make a rendition as accurate as possible (midi + commercially available samples) that could best illustrate the piece's charming and clear harmonic structures.

The first version approaches just-intonation through the correction of a few intervals -- in this case basically: 7/4= +20 cents and 5/4=-15 cents; the minor third can be thought of as either 19/16 (nearly just in 12 and 24) or 6/5, then to be corrected +15 cents.
In this rendition I chose to use 6/5 in bar 2 and 19/16 in bars 4 and 6.

The notation here is neither the one used by Hába or the most commonly used notation derived from Tartini (both of which I find have readability problems), it is instead a standard which seems to me the most logical and readable: quarter-tone alterations are very simply indicated by an arrow-head in the corresponding direction, so there are actually no new alteration-signs other than those, which are quite intuitive, visually effective (also from a distance or in small size) and unambiguously readable.

Enjoy - and thanks for listening!

Check out my microtonal discography in high-quality audio at BandCamp:
https://microtonalharmonyproject.band...