Equipboard's gear archive is collaboratively built and maintained by fellow music lovers like yourself. Anyone can submit gear and equipment to artists. Joining Equipboard also allows you to create your own list to track the gear you have and want, and follow artists like Deadmau5 to never miss gear updates.
A Beatport article from May 2008 shows a snapshot of Deadmau5's technical rider. This is taken from his performance at the Beatport stage at Movement 2008. The third item on the top row, right below the MacBook Pro, is the Apogee Ensemble audio interface. The original article can be found here.
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