Ach Gott, vom Himmel sieh darein (Georg Friedrich Kauffmann)
This is a very interesting chorale prelude for me as I got to be both an organist and an oboe player. First I practiced and recorded organ part (on the right). It took me 9 steps. Then while playing back the audio I recorded the oboe part (on the left). When all of this was done, I synched the audio with video in iMovie and made two separate clips. Finally, I mixed them together using split screen feature. Hope you'll enjoy it!