The bass is tuned to BEADGCF, and this solo incorporates all 7 strings in it. It goes as low as the lowest note (the low B string played open) and as high as the 2nd highest pitch (the high E played on the 23rd fret of the F string).
My girlfriend called me “so talented” for this 
It’s just one part of a whole song I’m composing all of the instruments for 
It’s also MIDI because I don’t currently have a physical 7-string bass 
holy bass