At launch, you can play bass (with 4 frets and 5 strings), drums (with 6 pads), and guitar (strummed or bowed); keyboard, brass, reeds, and vocals will be added in the future. There are 5 preset sound banks for each instrument to choose from; you can also go in and fine-tune your own sound. Tabs at the bottom of the screen will show you what buttons to press - there are chord shapes, single notes, or drum pads to play depending on which instrument you're using.