When I was grow up, al over the world was Discotec very famous. Of course it inspire the electronics too. If You had money enough, You could by everything, if not, You have to built it yourself.
In this time everybody want's to have:
and similar electronics too.
Some of the shematics on the fallowing pages I built too.
People in the Discothek was not only like the music then the visual efects too. It was a must to have a light orgel too. Following You can find the first shematic for.
I built this circuit too.