Raised-fifth grid

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The raised-fifth grid is a fixed 12-key keyboard tuning that raises one perfect fifth, and its complementary fourth, by 50 cents. The resulting 10+2 structure consists of ten unaltered 12-ET pitch classes and two raised pitch classes, enabling Middle Eastern modal step patterns alongside standard Western scales without dynamic retuning or additional keys.

Music

Siavash Talebi

Also singt Harmonie — a composition incorporating the raised-fifth grid; the relevant section begins at 5:18.

References

Talebi, Siavash. The Raised-Fifth Grid: A Unified Tuning for Western and Middle Eastern Modes on a 12-Key Keyboard. 2025. https://doi.org/10.5281/zenodo.17918296

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