Upon delivery everything should be in .png format. Each interface element will need to be delivered separately, i.e. for the 16 beat buttons, we'll need 16 .png files.
if you use stock photos/images please let me know as soon as you post your design. Include a link to the image license agreement. I need to make sure we can use it. I don’t want to have to DISQUALIFY your design after your put too much work into it.
Just make sure you keep in mind usability. It's a touch screen so no buttons can be too small.