estas Tonne composes and improvises such music with the guitar.
https://www.youtube.com/watch?v=GBiVq2MsCbs
https://www.youtube.com/watch?v=xk3BvNLeNgw
https://www.youtube.com/watch?v=747hJQNJpeg
https://www.youtube.com/watch?v=7gphiFVVtUI
Estas Tonne, is concentrating very often in permuting the chords of the basic harmonic triad of harmonic minor E.g. 3M7-6m-2m , and with varying arpegios and ostinatos for each one. Then extending it to 4M-3M7-6m-2m, Thus alternating melodic chrd transitions like 6m-$m or 2m-4M , and adding chromatic transitions like 3M7-4M.
Finally after spending much time on that extending it to the 6 harmonic cycle
3M7-6m-2m-5M-1M-4M
Some times instead of extending to the harmonic 6-cycle, he transposes harmonically e.g. to
6M7-2m-5m-1M7-4M-BbM7.
He may alternate the 3M7-6m fast or double the duration of each chord of the harmonic pair
3M7-6m, and get the harmony in slow motion.
The overall result is that by taking a well kown diatonic or chromatic diatonic harmony of a song with the arpeggios and ostinatos (riffs) the result is a 20- or even 55-minute musical improvisational piece!
