Crack a smile, look up at the file
The waveforms on the screen of me tryna tell you what I mean
But I feel that it's all lost, or maybe that it's all gotta cross

from Lupe Fiasco (Ft. Jane $$$) – Cold War Lyrics on Rap Genius

Meaning

Lu looks at the music files he has, with them he tries to connect to us and show us what he wishes.

At the end of the day, he never knows if it is perceived how he wants it to be, or if you even understand it

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