Musical cryptograms are words spelled using the 7 note names: A-B-C-D-E-F-G. For instance, you can spell the word “FACADE”, meaning the front of a building.
Another longer example is “BAGGAGE”, meaning a number of bags.
Baroque composer J.S. Bach, often spelled his name out in a musical motif. (In German notation, B is denoted by an “H”.)
A very popular cryptogram for teaching notation, is the “FACE” chord.
The Face Chord is known as an F Major 7th. Major Sevenths are the chord of love. Below, is a little song that uses “FACE”, and even explains itself to the listener, making it a fine example of a Meta-song.
Finally, you can play a “DEAD” melody.
“DEAD” is an incomplete D 9th chord. Below, is a “DEAD” song. The notes of the bass spell “DEAD”.
The upcoming Los Doggies album uses a plethora of cryptograms.