One single pick sounds nicest to me.. but this is still a very cool experiment.

The "rubbing" sound described by the author is distinctive, more exactness across many strings isn't always more better.

Otherwise you might as well be playing a piano (in my humble, plebian rocker opinion).

A good companion video to this might be The Psychology of Extreme Rhythms from Adam Neely's channel: https://www.youtube.com/watch?v=DRLTjESyuQk

Reminds me of Boyd Rice's rotoguitar (a fan attached to a guitar) and the extratone genre (extreme techno kick drums that run so fast they turn into pitched tones).

Thanks to comments in this video I learned about hurdy-gurdy. What a beautiful instrument, what a music.

https://m.youtube.com/watch?v=bvNZeh6f8vE

This guy has done a bunch of cool/dumb instrument/tuning/etc mods, mostly with pianos and guitars. I particularly enjoyed his videos of making an electrified piano[1] and making guitar strings from spider silk[2]

[1] https://www.youtube.com/watch?v=4opcNLIQqt4

[2] https://www.youtube.com/watch?v=1DzTHI-n7-E