Basic tutorial

use DPAD to mové cursor

Use cursor to navegate len to change Length of track, Tip put first 1 or 2 or short numbers

Use A+DPAD to change values

Now use SELECT +D-pad to navegate in screens to MIX

Change Volume registers NR50 - NR54, Tip put FF if don't kwon

And Sets a delay per note

Can use B to paste current value... 

Use SELECT +DPAD to chanels Example PU1 and modifield registers

Press START to play/ pause

enjoy