Korg Delta

This Korg Delta had a broken top octave divider IC. Only some noise could be heard when playing the synthesizer. The Client also wanted to add some inputs for audio processing through the Filter and the Ensemble.

Left = Main oscillator board with top octave divider and the larger note divider IC's. Right side = Ensemble PCB.

The Delta has one main oscillator running at high frequency this is then divided down into all tones of one octave, each tone is then divided by the three larger IC's into the four lower octaves.

Here we can see the labels I put on the front for the external audio inputs.

And here are the inputs them selves. The synthesizer part of the Delta actually sound quite good, especially the filter.