Just to add to what Bramwell says, I found this article which very much surprised me in that it seems that the app market is experiencing a paradigm shift.http://www.guardian.co.uk/technology/ap ... pers-sales
Althought the music/production market is probably different to the general market I grant you.
However I will state again that for everythign else I want to use a phone or tablet for, android is better and more integrated into my life than Apple, so it is immensely frustrating that I am in a position of having to potentially buy an iPad purely for musical use.
There are a lot of musicsians and producre like me, who are struggling to justify the cost of a tablet just for musical use, but would have no problems justifying the cost of your app if it ran on a device they already owned.
So I personally think you're missing out on a market. I am moving away from giving in on the iPad, and will probably utilize TouchDAW instead on Android. Its not as fully featured as your app, but at least it means i am not forced into buying Apple.
Good luck to you in the future and I hope to see your app turn up in the Play store :)