I really like the sounds that this music tool produces and also really appreciate the innovative way that you set up songs in the app. I actually find this to be one of those novelty/gimmick applications that I don't grow tired in the first ten minutes of use.Those above reasons are why I felt that this app deserved the four stars that I gave it. Yet, I was very close to giving the app only three stars for a very large reason - its limitedness. Why any music production app developer builds an app today and purposefully leaves out AudioBus compatibility, well, I just cannot fathom this extremely poor decision on the part of the developer.The listed way to actually record and save a song in this app, has apparently something to do with utilizing some function in OS X Yosemite, I guess? That just makes absolutely no sense in my opinion, to relegate the only recording/saving/export option to doing it outside of the application on your Mac computer (assuming you have Yosemite installed, I don't). Why would you not just include the ever useful, premiere recording tool on iOS, AudioBus in this app? You can apparently save your compositions by making a $1 in-app purchase. But, honestly, what would be the point in doing that with your songs being forever stuck inside the application unless you have some bizarre Yosemite Mac thing?I personally believe that this app succeeds at giving you a very fun and innovative way to create midi-esque tunes. But, I also believe that it ultimately fails as an application for offering no reasonable way for the user to record and export their work done in the application (i.e. AudioBus.). You may feel differently about this app than me, but I just see it as nothing more than a fun toy right now with no way for the user to truly create and save their work. Quite a disappointing app in my opinion. I quite enjoyed the time I spent creating songs in this application but I just see no point in putting time into creating music if it is for all intents and purposes, stuck in the application forever. If the developer would add AudioBus to the app I think it would instantly become a five star worthy music tool.iPad Air 2/ iOS 8.1.1

No instructions. No sound(!) (yes I'm unmuted and the sound is maxed) and no play button. No save functionality unless you pay. Not that it matters since you can't hear $*%t coming from my new iPhone 7 plus. Lame. Don't even bother.Edit: found the instructions buried under "app support" in the app store. They are useless.

And no controls for background audio.

This app proposes a much more fun way to create music!