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The first stage of a CMOS Top Octave Synth. I use four 40106 IC's to generate the top octave twice (8' and 16'). The notes are tuned with two rows of trimpots and then divided using 4040's. The outputs from the 4040's go to the corresponding key. The key switches the note one, and all the notes are mixed using a TL071 opamp. Once I work out a few of the little bugs you see in the video, I will be adding filters and effects to modify the sound.
