Just found this photo of us all being in awe of @jpetazzo's talent at the @linuxfoundation #ossummit speaker party, and it's so perfect 

pic.twitter.com/M6IuzmW98j
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That'd be the easy option, but from my (limited) experience the workflow was quite different (at least Traktor+CDJ vs "pure" CDJ)
(I will confess that I quite dislike the workflow of CDJs, but I'd love to practice with them since that's what is in virtually every club!)
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