Just yesterday, Deadmau5 posted a youtube video revealing more about his new touchscreen software. He unveiled a prototype at the Veld music festival, where he used a giant 100" touchscreen to control what appeared to be a hybrid between the touch osc application and liine's lemur software.
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The Youtube video description reads:
Thanks to our partners over at microsoft and their PPI team, our team were able to make some pretty righteous touch software that drives the OSC / Midi to... other ... stuff. ;) ... its still early in development, but were making great progress. Heres a quick demo!"
It is unclear when this software will be released, or if it will even be released at all, but knowing Deadmau5 he will continue to tease us with glimpses at what he and his team at microsoft have in store for us.