I used to have a C/G anglo concertina but only ever played it for my own amusement so the key wasn't that important. I have started going to local folk sessions and am considering buying a G/D instrument. Could anyone give me information on the comparison between the two.
For simplicity, let's consider 20 button instruments only. On the C/G, the outer row of buttons is in C and the inner row is in G, a 5th above row 1.
My questions are: On the G/D, is the outer row G and the inner row D ?
Does the G row on the G/D give the same notes as the G (row 2) on the C/G ?
Is D row 2 on the G/D a 5th above the G row or is it between the C and G of the C/G ?
I hope you understood that because it has confused me !