It's fun when you hear the effect in commercial music too. For a while it only really showed up in stuff by IDM producers trying to sound weird, but then it got more mainstream and nowadays you hear it in everything from techno to dubstep and even pop.
I wonder if these black MIDI artists require a specific sample set to be used for playback, so they can control how the waveforms interact. I also wonder how much they use velocity, aftertouch, modwheel etc to shape the sound, or if (for example) the percussive effects are just a result of careful stacking.
Right. And this still applies today. And anyway: I bet > 98% of all listeners would not notice the difference between 6 millions or only 1000 notes, even when the system was capable of playing every specified note. The whole thing is just a crazy gimmick with no practical use.
https://masterbootrecord.bandcamp.com/community
I looked for a bit and no, although he does use a lot of short notes. Most of the complexity is in the samples (which I guess is the usual way :) ). Or the instruments I should say, I'm guessing those are primarily sample based. He uses Cubase 8, Massive VST, and Superior Drummer 3.
I like the "no arts" version that removes silent notes, as it makes it more enjoyable (for me!) to follow what's happening : https://www.youtube.com/watch?v=VcfmPZVqVtw
However, one other interesting aspect of a song like Tau is the "performance" of playing these note-heavy midis. You are effectively recording a live performance of your computer processing/performing the midi file, it is not like playing a recording.
This implies that for a good portion of black midi history, it was not possible for most computers to play those files without screen freezes, heavy skipping notes, and then recovering after the hard portion has passed.
It was/is necessary to overclock CPUs to avoid or minimize these artifacts on songs like Tau.
And it can be said that screen freezes/note skips are integral parts of the performance. At least that's my take and I really do enjoy seeing the computer almost giving up to then recover and finish the song.