OSKITONE OKAY 2 Synth, Assembly Manual

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It’s up to you which CD4040 output pins you want to pick,
but I tend to go with 4-6 and 7-9. The higher octaves (pins
1-3) can be painfully high for human ears, and the lower
octaves (pins 8-12) sound more like a metronome than
musical notes.
Once assembled, the octave control will be turned
clockwise to go up and counterclockwise to go down.
Because you’ll solder the switch upside down with its pins
pointing up, the most clockwise pin will be the lowest note.
Experiments to try
●
Replace C1 with a capacitor of lower value for a higher
frequency or a higher value for a lower frequency
●
Try a different value for R1. Just like C1, a higher value
makes a lower frequency, and vice versa.
●
You can actually mix the 4040 outputs to create richer,
interesting sounds. If you connect them directly you’ll
get a modulated sound, where the higher frequency is