I have a homebrew idea but zero programming ability. I'd love to be able to DJ from my DS. It would basically involve using the DS to play two separate MP3 tracks at once and using the stylus to 'mix' between the two. This could be expanded upon by adding tempo/pitch controls, possibly some kind of beatmatching, playlists, maybe even effects like filters.
The BIG problem I forsee would be outputing two separate tracks of audio, one for monitoring and the other for the mix. This would require a hardware stereo to mono splitter plugged into the headphone socket and then also the ability to output different audio sources to the different stereo channels, i.e. separate Left & Right.
But I'd like to start simple, and if anybody has any knowledge of programming for DS, I'd love to hear from you.
PM me or 'firstname.lastname@example.org '