We need a developer to write a Mac version GUI for our USB audio interface. Our USB audio interface acts as an effector which receive audio signal through USB and return 24bit audio signal back through USB. The GUI will also send and receive control code to/from the interface. It will also have the function to save the signal to a file. It will be great if the developer has the ability to develop similar iPhone Apps too. The budget is quoted for either part. The price will be negotiable.