Another cheat sheet for the Arcade - this one outlines the key signatures that lend themselves best to the Arcade chord layout. It is great for quickly coming up with chord progressions
Arcade Duncan Laurence piano number coloursystem sheet easygoed 2 Sheet music for Piano (Solo) | Musescore.com
Jamming with OP-1 & PO-20 arcade? Chord guide! : r/OP1users