We are electronic performers..Oops! Sorry about that, I meant to say
tracker musicians. We use a type of music sequencing software called tracker, of which there are plenty around for various purposes. Here's a couple:
Professional/commercial music production using the latest and greatest modern trackers (that rival concurrent mainstream sequencing software) like MadTracker, Open MPT and Renoise.
Then there's the emulation/cross-platform trackers that enable composing music for obsolete computing and gaming platforms like the C64, NES, Gameboy, Atari computers etc.
The main focus however here in The Mod Archive is on sample trackers that originate from the Commodore Amiga. Since you mentioned keygens, I'm assuming this would be the category in which you're most interested. Keygen music usually has to be small in size, so instead of using samples of real instruments and such, tiny sound wave fragments are used instead which makes the music sound a little like the previous category,
oldskool. You can read more about
module files and
trackers on Wikipedia.
Some historically significant trackers (because of their popularity) are ProTracker on the Amiga, Scream Tracker 3, Fasttracker II and Impulse Tracker 2 on PC/DOS. Current sample trackers include MilkyTracker, Schism Tracker and ChibiTracker which are multiplatform and NitroTracker on the Nintendo DS.