MB6582 build. Issue with 12V 6581 sids chips

[serlein]

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

Edited May 5, 2020 by serlein
spelling

[Noise-Generator]

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