Hi Karel, compare: A111-A138(FullOpen)-SSG-Cubase with A111-MAVCA(FullOpen)-SSG-Cubase You see, that in both cases the high frequency level drops. So now it is clear: The cause is NOT the A-138, because the same behaviour can be seen with a non-Doepfer-module too. The problem is caused by the SSG. I assume its input behaves with the output circuit of the other modules like a lowpass. This is assumingly a concept fault of the SSG circuit. I don't know the schematics of the SSG, so I cannot tell details. But your tests proove it. Florian
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Re: [Doepfer_a100] Behaviour of a Doepfer Mixer (A-138b)
2016-07-20 by Florian Anwander