With the four-track, bussing
Halfway cross that city with the backpack
Lil' Macklemore, back in the days, brought his 4-track recorder across Seatle on the bus, to work with other people. Bussing also refers to mixing audio tracks on a mixing desk; since he only had 4 tracks, he’d have to bus several instruments and microphones into each track to make a full song.
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