Ave dulcissima Maria,
Vera spes et vita dulce refrigerium.
O Maria, flos virginum,
Ora pro nobis, Jesum.
Carlo Gesualdo da Venosa: daring enharmonicism and solmization — three hexachords simultaneously, 147 keys per octave.
If you want to respect major and minor semitones, keep the distinctions between enharmonic sharps, avoid flattening all fifths, and allow coherent mutations…
then Gesualdo’s ‘real’ keyboard cannot exist physically.
It can only exist
as a mental abstraction,
as an ideal tablature,
or as a virtual instrument that accepts madness as its rule.