Black MIDI

There is apparently a subculture that tries to create sound files with the largest possible number of notes.  They call it "Black MIDI," where MIDI is a type of sound file and "black" because there are so many notes the page looks black.  This example has about 8 million notes.

Let's do the math.  8 million notes in a 5 minute song, or 300 seconds.  That makes 26,666 notes per second.  Since a keyboard has 88 notes and these appear to correspond to a regular keyboard, each key would have to be pressed an average of 300 times each second throughout the song.  Or maybe I should put scare quotes around "song"...

A bit more here.