it is literally what you see use keys 1-0 to play a B A B Y N O T E 1 for piccolo 2 for sopranino 3 for soprano 4 for mezzo-soprano 5 for alto 6 for tenor 7 for baritone 8 for bass 9 for contrabass 0 for subcontrabass
so when you press the green flag it plays mary had a little lamb
