Max MSP
Max MSP is a compter music software that allows you to create stand alone applications by using and connecting a number of 'objects'.
"Max gives you all the tools to create your own music, sound, video, and interactive media applications. You can arrange boxes on a canvas and
connect them together to create, experiment, and play."
(Max MSP Website)
In GyroPan the whole software, including the GUI, is made on max. GyroPan also used a object on Max for Head Related Transfer Functions called ep.binSpat~
Arduino


c74 iPhone Remote App
The c74 iPhone application and Max MSP object allows GyroPan to seamlessly connect to an iPhone to use as a remote through a local network. Through Max MSP you can also create a GUI on the iPhone and access and control some of the phones features, such as the vibrate and shake functions.
The iPhone application is available from the Apple app store and the Max MSP plug in from their website.