Well Audiobus is the first true multitasking feature in iOS. A complete new and pretty simple workflow for musicians that just works. You can make professional recordings out of several connected (and supported) music apps on one and the same iOS device. (Routing through more than one iOS device is in development.) I am really excited about Audiobus. I tried it on iPad 3, iPad 4 and iPhone 5 (tested with Sennheiser and AKG reference headphones) because I have most of the supported music apps. You get some kind of an Audiobus multitasking/remote control bar in the music apps where you can switch apps, start/stop recording and more. Audiobus works flawless and stable and sounds really good! Pretty impressive for a first version. Okay let's hijack this thread and give some app info about that nifty Inter-App Audio Routing System/Audiostreaming feature: App info is currently processing and/or the app is not yet fully available for sale on the US App Store. This is important so I'll repeat: Note: We recommend using Audiobus with iPad 2, iPhone 4S or newer devices. iOS 5 or newer. Mind that Audiobus doesn't produce any sounds, you need some supported music apps. And four demo videos: Audiobus introduction: Subscribe to the TouchArcade YouTube channel Using Loopy HD (by the same devs like Audiobus, on sale as well) to loop JamUp with FunkBox/SoundPrism Pro (SPP on sale right now) filtered by NLog (on sale as well—both iPhone and iPad versions), listen to that folks: Subscribe to the TouchArcade YouTube channel The guy who uploaded the next video says: "This is a demo of the incredible app, Audiobus. This track was created with JamUp Pro XT, Multitrack DAW, Audiobus, DrumJam, Beatmaker 2, and Drums XD." Don't miss that: Subscribe to the TouchArcade YouTube channel You can use MIDI and Audiobus at the same time! Recording SoundPrism PRO, Sunrizer and Funkbox in MultiTrack DAW with some Virtual MIDI Magic: Subscribe to the TouchArcade YouTube channel Dev says: I've put together some information on Audiobus. I know it's German-language but there are lots of links, videos, comparison to CoreMIDI and information in English as well: http://wp.me/poZqi-8eu http://wp.me/poZqi-8dQ Audiobus forum: http://forum.audiob.us/ More in-depth info (preview): http://createdigitalmusic.com/2012/10/ipad-iphone-creation-is-working-how-audiobus-more-will-connect-your-music-workflow-in-depth/ Some things they want to add in the future: Routing with more iOS devices Sound-triggered Recording Timed Recording Multi-Channel Input/Output Save the Audiobus configuration Some technical info: http://audiobus.tumblr.com/post/24476100621/audiobus-self-repairing-audio-stream Back to topic: DM1 will support Audiobus soon. Highly recommended! The User Guide (PDF) of DM1: http://www.fingerlab.net/dm1/DM1_USER_GUIDE.pdf Dev's website with loads of demo videos and documentations: http://www.fingerlab.net/website/Fingerlab/DM1.html