As you can see in the video that's what I did. When I feed the saw wave directly to the SSG I get that nice high frequency moving sound. When I run the saw wave first through the mixer that's gone. The purpose is to mix several wave forms before they go to the SSG. But then as you can hear and see it then lacks the high frequencies.
I tried the A-130a, A-138m and A-135-1 too and they all react the same for that matter.

On my scope the wave forms looks the same before and after the mixer so what's the difference

I will contact Random*Source too.