I've been working on a new version of Audiobus which includes support for AUX MIDI out, fullscreen AUX view configurations, multichannel audio out including Multiroute Audio, automatic app recovery (replacing the annoying "Tap to Fix" in most cases, I hope!) and a revised UI design, among a few other small bits and pieces. It also should now work on iOS 9, for those with older devices.
I need as many testers as possible to help put it through its paces, as there are some big changes under the hood. Can you help me out? Sign up at https://audiob.us/testing - and thanks! I'll be pushing out the first beta over the next week or so.