MB6582 build. Issue with 12V 6581 sids chips

So i am bussy building a MB6582 and i am this far to start testing sound. I build a MB6582 with 12V - 9V and 5V options. So that i can use all types of sid chips if i want.

The problem is when i’m using 12V 6581 sid chips. When a “note off” is played you will still keep hearing the last played note but a little less louder. I don’t have this issue when i’m using 9V 6582 / 8580 sid chips. So i guess there is a problem somewhere in the 12V power line. Any ideas where to look?

Grtz

MyLowesLife

This is, unfortunatly, normal with the original 6581. You need to use an noise gate effect, to get it under control.