A great song written in B flat minor key

B flat minor is possibly the most rare key on our planet.


The only white notes are C and F. Everything else is black key, (flats).


No wander songs written on this key are rare.


An example is the one hit wonder Captain of Her Heart - Double


It is based on the bass code:


B
A6
G7


ie


B D F
A C F
G B F


And since we know only C and F is natural...


It is:


Bb Db F
Ab C F
Gb Bb F


See also:


Bach Bass Rules PDF