For me pre comp is about keeping my mind right and staying super calm and collected until about 5-7 mins out from my match. Prior to that I'm listening to some Daft Punk, Justice, Skrillex, Nero, Glitch Mob. Then when my name gets called and it's getting close to go time, I put on a The End of Heartache by Killswitch Engage and I just go out there and do my thing.
At the gym we listen to everything. We try to stay consistent with Hip Hop/Hard Rock/Metal/Electronic Shit and everything in between.