Android audio recording logic

I need clean code for following abilities on one view controller (you don't have to worry about UI or UX): Recording & playback: - A method that allows me to record from the mobile device's mic by holding down the button. Stop recording and saving that audio file when the button is let go. - If I have 5 recordings, I want a method that lets me play them all back at the same time. I also want the ability for each recording to play at their own rhythm. so I can pass in a [5][5] array of boolean bitmap. each array is a bit map for each separate beat Composition: - A method that lets me concatenate the recording into an X second track. For example, I can loop a 6 second recording 50 second times, so that it becomes a 3 minute playback. - This method receives a boolean bitmap, so if my bitmap input is 10101, then when I am combining the track together, every 0 is a silence equal to the duration of the recording, every 1 is the recording itself. - If I have 5 recordings that have 5 bitmaps, I want a method that allows me to combine them all into a X second length mp3 file.