Touch DJ offers realtime independent manipulation of 2 MP3 files, including scratching, looping, positioning, equalization, effects and and pitching.
Touch DJ gets around the limitation of one set of stereo outputs by focusing on “visual mixing” – the graphic display of the track waveforms next to each other. The low-bass (kick) parts are detected and rendered in different color compared to the rest sonic frequencies, making beatmatching as easy as adjusting the tracks position and pitch so that the kick parts become visually matched.
As an alternative for users who prefer to prelisten to tracks, Touch DJ also offers a second “Split” mode of mixing which requires the usage of a special l/r splitting adapter.
Other features include LP filter FX for each track, vinyl Spin and Break effects, onboard sampler with 3 sample slots (accepts .WAV files) and the ability to record samples via the microphone.
Touch DJ uses its own music library, independent of the iTunes music library. The app is shipped with 25 dance tracks provided by DanceMusicHub.com, and you can load up more using a utility available at the Amidio site.
Touch DJ retails for $19.99.
If you’ve used Touch DJ, leave a comment with your thoughts!
Note: DJ apps have been slow to be approved by Apple. There’s a petition you can sign to ask Apple to speed up the process.