Sounds cool - although I'm not sure about another iOS DJ App, there are some great ones already. I love the sound of SID, actually been listening to some Last Ninja 2 soundtrack just today, I don't go a week without listening to at least 1 ocean loader
. I find it kinda sad that every song has to be over 2mb these days, I miss the days of 2k music files that sound awesome... even beyond how nice they sound tho, the way the SID chip worked was great, I didn't really appreciate it until I got an ST with it's similar YM2149. Actually, might be worth supporting that as well, it's probably really similar in how it operates.
One thing that a friend asked me to look into is YouTube DJ'ing. Not videos, just the music - so you could search YouTube for a track, as well as replay music on your device, like a DJ app that lets you use YouTube video soundtracks and your own music library. He actually does something similar already, having 2 youtube windows open on his laptop at the same time, but having a standalone app that can do that would be great, I'm sure people would love it.
I got a fever, and the only prescription, is more memes.