Casio SA-7 - Review & Output Modification

This is my full review on the Casio SA-7, a mini-keyboard from 1990.
I will install an output jack, play some sounds and rhythms and do a little multitrack recording.

The SA-7 is identical to the SA-9 except for the colour, and more or less identical to the SA-1 which has an output jack and a diffrent demo tune. But there are a lot of Casio SA keyboards that use the same chip and share the same sounds. Some have drumpads, more demo tunes and/or a higher polyphony, a diffrent housing and sometimes less sounds.

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Listen to the full version of my multitrack recording on
Bandcamp: https://keenonkeys.bandcamp.com
or Soundcloud:   / user-229361059