What is a GCF accordion?
A GCF accordion is a type of button accordion. What GCF means is
that on the right hand side of the accordion (where you play the
melody line) there should be three rows of buttons. One row plays
notes in the key of G, one in the key of C, and one in the key of
F. This means that you can play songs that are in those three keys.
To understand what I mean by "keys," you need to know a little bit
about music theory. Think about it as if you were playing three
different guitar chords, G, C, and F. Well, for the GCF accordion
it is the same except with buttons to press instead of strings.