Discussion about the Korg PolySix synthesizer

On 05.09.15 23:40 , backshall1@bellsouth.net [PolySix] wrote:

 

Are those the midi jacks way over on the right hand wood panel at the end of the yellow wires? Considering they should be as close as possible and preferably use shielded cable, those look like they are as far away as possible and not shielded, although the tight twist in the wire does a decent job of cancelling out any noise picked up.

I doubt that this noise is induced by interference. It is clearly a single signal with increasing frequency counting up to 8 variation directly related to the keyboard.

I think we should focus on finding the place where this kind of signal is generated. It must be a chip, which is addressed by three bits (or more more bits, where three of them are shared with the keyboard matrix) and it must be a chip that generates a frequency (clock, reset signal, ... ) depending on this address.

Florian