Top Octave Divider - the hard way!

The Top Octave Divider IC is a brilliant component when you want to make a polyphonic instrument: You feed it with a stable 1 or 2 MHz master frequency and based on simple integer division it calculates a complete chromatic scale.
But what if all supplies of this IC was suddenly dried up and there wasn't any microprocessor based options available? Then we would have to make it using good old 1970's digital counters and gates.
This is what I am doing in this video: Constructing a Top Octave Divider using nothing but counters and gates. It's not exactly difficult - it's just quite a lot of work for just twelve notes.

I might be tempted to say: WARNING: Don't do this at home - it's way too much hassle!

The music is a silly little waltz I put together on my Casio WK-1800.