i never heard of this app before, seems like how i would want to do it... i started with trackers in the early 90s and then in the mid noughties i tinkered with ableton, having long before that seen cubase and the whole piano roll notation... unfortunately all lost but i made some tracks in like 1992 which would have been quite resembling artists like Tumor and Noisuf-X

Will never forget at Newbury Comics, back in 99, an employee describing Aphex Twin to me as the Jimi Hendrix of electronic music. So cool to see how he programmed his sounds. I never understood it before. Very cool video!