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The whole of the HOME Wipeout Museum was built by Zico Liu, of beat Zico fame.
He's still working at SL as far as I know and would be the best person to ask.
I know he has a Facebook page, but as I'm not, and have no intention of signing up to Facebook, I can't give you a link to ask him about the soundtrack.
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I think they are loops made especially for the Wipeout Museum but its possible they're loops taken from licensed music. Although in that case i'd have thought they would be credited in full.
Has anyone tried those music identification phone apps like Shazam?