Other key signatures

Hello. I love this app. Good job on it. I have a suggestion for it: would it be possible to add a transposer option so one could listen to a hymn in any key signature? For example, I like to play/listen to hymns in the key of "A Major", and there are literally only two songs in the hymn book in that are in that key signature. Bottom line, I was wondering if you could add an option where you can switch keys signatures, from C Major to A Major, for example. Please and thank you. Great app overall

Censorer about Sacred Music