[link to original on tumblr]
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Near the end of last year, I thought I'd attempt the solo from "Can't Buy Me Love." I never got around to it, but listening to 1962-1966 a few days ago made it really obvious that my suspicion that it was double-tracked (with a few differences) was correct (because that version is in stereo). I figured this out the same night I figured out the bass part to "Help!"