All interesting and useful suggestions. i like the analog switch ic's but don't have any i do have various transistors so i might give it another go before i but some ic's. It's a polyphonic analog keyboard nothing very expensive (which is good). A multivox mx-65 a bit of an obscure company that had some similarity's and dealing with Roland in the early days. Any way here's a picture of a section of the switches and oscillators i think. Someone mentioned organs i think this is some kind of frequency divider arrangment, it's defiantly not a matrix of any sort. Thanks for the ideas guys
seems best to open the image in a new window
