I thought one of the preamp or ADC of my CQ12t was bad. Even at maximum gain, it was impossible to drive a dynamic mic upper than than the green “zone”, while it was possible with other inputs.
If fact, few days before, I had to use the “bad” input as a digital channel, set some trim to -12db, and back the channel to analog input. At this step, It was not shown, but the -12db trim settings was still active.
I had to put back the channel again as a digital channel, reset the trim to 0, and set back the channel to analog.
Imo, trim settings can be retain while channel set in analog, but not applied in the channel sound chain