The d-touch music system has continued to evolve since we saw it the first time. It is completely free, why not give it a try!

"The release of audio d-touch is itself part of a research project about novel computer interfaces. Our aim is to advance the field by gaining insight on how tangible interfaces may be used in the real world. Please help us by trying out the applications, letting us know what you think and spreading the word about audio d-touch! To inform our research we remotely record usage data from the system, in the respect of our users’ privacy: we do not record images, but only the positions of the objects in the interface and the sounds recorded on them."