Classic TR-909 cymbal voices

This is the classic TR-909 cymbal voices. I have converted the design to SMT components that are easy to source.

There are three possible build option; 909CY with both voices and a switch (or control input jack) to select between them. The 909CS which is the Crash sound and 909RD which is the Ride sound.

https://github.com/tkilla64/eurorack/tree/main/909-cymbals