chordVar -> (c, e, g, c+1)
block {
(a, b, c)*<q>
chordVar*<q>
[chordVar:0., chordVar:1!, chordVar:2~]*<q>
(chordVar, e+1, f+1)*<q>
(chordVar)*<q>
chordVar^*<q>
(a, b$+1, c#+2)~*<q>
(Cmaj7, c+2)*<q>
(Asd1minmaj7:1, a-1)*<q>
}