this guitar uses a scale consisting of 8-15 of the harmonic series. it can also be described as follows:

1/1 - tonic
9/8 - major second
5/4 - just major third
11/8 - quartertone between perfect fourth and raised fourth
3/2 - perfect fifth
13/8 - neutral-ish sixth, closer to minor sixth
7/4 - harmonic minor seventh
15/8 - major seventh

the open strings of the guitar are tuned to 2,3,4,5,6,7 of the harmonic series.

more info at danterosati.com

Paracelsus

C sound piece where timbre, pitches and durations  are determined by prime numbers:

Dante Rosati

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