SOMO II sound volume wobbling

[Genesis]

Hello Doff. Where can I find this info?

[Doff]

It should be written on the SOMO-II PCB, backside. "Rev 1" or "Rev 2", etc.

[Genesis]

ok Doff
One here is REV1.
I will check the other one this evening at home but it was ordered a month ago. edit: yes it's a REV2
but both have the problem.