I'm pretty sure, since you'll need 56va or more type notations to get it back onto the treble clef, where "8va" indicates play 1 octave higher than notated, tha

I'm pretty sure, since you'll need 56va or more type notations to get it back onto the treble clef, where "8va" indicates play 1 octave higher than notated, that many/most of the notes will be above 18kHz. Before my Dad lost my flute, i used to be pretty good at reading notation in the 2 octaves above middle C range, but that hurts my eyes. Maybe you could revoice all the chords and we can figure out harmonic structure