BeatMaker 2 is the most full-functional DAW for iPad and one of the most popular music apps for iOS. BeatMaker supports Audio and Midi tracks (however this app is not best one to work with Audio tracks).
Combining music production tools that were behind the success of countless artists, this app is a powerful, easy-to-use composition interface for amateurs and professionals alike. Build your own virtual home-studio, create multiple instruments and connect them to a full-range of audio effects. Compose, record, arrange and transform your ideas into complete songs, ready to be shared with others.