We published an article a few days ago about the release of Garage Band for iPad, Apple have now released more details and you can see them here.
There seem to be some really cool features on the app. Instruments are set into Drums, Drum Machines, Synthesizers, Keyboards, and Smart Instruments.
Multi-touch drum kits will have different tonal qualities depending on where you hit the drum, and how hard you hit it. If it's not the sound of an acoustic kit you're looking for, then you can always use the drum machine which is made up of 12 trigger pads.
Smart Instruments, such as the Smart Guitar, are designed specifically for the iPad, and make it easier to play the instrument on a touch screen. We've seen whole Apps dedicated just to this function before, so this makes the fact that Apple have incorporated this as part of a multi-function App all-the-more impressive.
The studio multi-tracker looks a lot like the edit window in Garage Band for Mac. This includes layers that you can trim and move around with a swipe of your finger.
On top of all this, we have amp-modelling, stombox effects, and a live audio recorded for vocal recording.