Maybe you can design attachable module to replace the cable and the need to be connected to iPad or Computer.
It would be connected to USB port on current Artiphon and would house a piece of electronics which would replace computer. Ideally it can be preconfigure preconfigured in your computer and upload the instruments you would like to use. And also Bluetooth connection to connect with headphones or receiver.
It would give freedom to jam totally mobile by using headphones or instrument speakers.