[FoolProofParticipant]

Thank you, David!
This workaround indeed resolved the problem. At least I know now that this isn’t a hardware problem. Of course this means that I have to do this for every scene…?

[FoolProofParticipant]

Well, I checked all your suggestions. No DCA assigning, mute groups, routing… The piano is fine, we played it on ST2. ST1 is absolutely dead on all scenes. No VU activity, not even a little crossover with max volume. Of course it might be a hardware malfunction (preamp broke), but first I want to find out if it has anything to do with V1.7.
That brings me to the next thing: how do I downgrade?

[FoolProofParticipant]

Nope. That was my first thought as well.

[FoolProofParticipant]

Thanks for you answers. I finally found what I was doing wrong. This is how I solved it: Select layer 2, then select the FX (1 or 2) return channel, access the routing screen (it shows FX1 or FX2). LR level was set to infinitive, set it back to 0dB, that was it. In this screen you also can assign FX to the mix groups.

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