Best Music app available on any OS platform.

Use it for video to add back ground track. Let you use as much automated track manufacturing, or as little as you want. Good for learning to understand how to put a track together, for all skill levels. More advanced features on the laptop version, but this has the basic core that you need to lay down audio, lyrics, at sampling. Fun and useful, works with midi devices, keyboards ect. Best music app you can on any operating system bar none.

Bionicscionospheres about GarageBand, v2.2.1