Algoriddim's djay for iPad, a tablet-optimized version of the popular DJ software for Macs, is one of the first apps to take advantage of the new audio options afforded by iOS 4.2. Yes, even you can beat match your tunes!
djay, iPad, $20. One of the first truly compelling DJ apps for the iPad, djay will let you load two songs from your iPod library, automatically detect and match their BPMs, crossfade between the two, speed and slow their pitches, set and trigger cue points, adjust EQ, and record all the magic as its happening. You can "scratch" the tiny little records—which awesomely are stamped the files' artwork—to manipulate playback, or drag your finger across a waveform to jump through a song. Or just hit "automix" and let the app do the work.
People who like the idea of being a DJ more than the reality of going out and buying a bunch of DJ equipment; people who consider themselves iPad music app enthusiasts; people who play their party playlists from their iPad; people who really enjoyed Kanye West's College Dropout-era chipmunk soul samples or that 800x slower Justin Bieber jam and want an easy way to make their own.
It's beautifully designed, just like the Mac software that preceded it, and it eliminates the headache of iTunes file sharing by letting users draw from the songs they've already loaded on their iPad. It was built for iOS 4.2, so it works flawlessly with AirTunes and can run in the background while you surf the web or check your email. And—and!—it has an Automix option that will match and transition songs for you, basically taking the work out of this whole DJing business. Just stand by your iPad and make yourself look busy—everyone will be very impressed.
One big thing that's missing, though I've been told it's slated for forthcoming updates, is the ability to set endpoints for loops and automatically loop sections of a song. It'd also be nice to have an easier way to pull up a certain group of songs—some sort of queue or tray or something—than tapping the add new song button and navigating through every time. Also, some more effects could be handy, as well as some additional options for the recording feature.
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