Ch13 / GbM, Gbm, Gbaug, Gbdim, GbM7, Gbm7, Gb7, Gbm7(b5), ...
Ch13 / GbM, Gbm, Gbaug, Gbdim, GbM7, Gbm7, Gb7, Gbm7(b5), ...
is a song by
Michael Pilhofer & Holly Day
it was released on
Music Theory for Dummies
