How did you select the input ?
By clicking the button IN ?
You may have to confirm the selection by clicking the button SELECT afterwards.

I click [In] until the "Opt"(ical) LED lights up yellow. Then I click [Select] repeatedly, but nothing seems to happen (as it does with [Ch 1/2] and [Ch 3/4]. And, no matter how many times I click [Select], turning the large rotary control does not affect anything in TotalMix that I can find.

In fact, there does not seem to be any Gain control like the Gain control on the [Ch 1/2] and [Ch 3/4] strips in TotalMix.

Perplexed.

Thanks @waedi ... I did not catch the text on page 11 ... I only saw page 9 ("IN gives access to Gain control ...").

So ... it's sad that the big encoder knob does nothing for ADAT input. A bit of a waste. Having it control the mix fader on ADAT 1/2 Input would have been great in my use case ...

Ahhh, well, I don't actually have an ADAT interface hooked up.

I'm using the ADAT channels of the BBF to route audio signals between Cantabile (Live DAW that renders my WindSynth sounds) and Ableton Live (for clips and looping), to route a Windows media player (Amazing Slow Downer (ASD), which give me pitch and tempo adjustments) into my signal, and as a mixer to merge the ASD, Cantabile, and Ableton outputs to send to the House (out the XLRs), out to my local monitor (out the TRS ports).

I take a Mic feed in XLR 1 that goes to Cantabile. I also take the House monitor feed into XLR 2 and mix it with my outgoing signal and feed that into my own local monitor mix, so that I can control how much "ME" I can hear in my monitor versus the other sounds of whatever band I'm playing with.

This setup has been versatile and robust (thanks to *Zero* RME failures in 3+ years). It also manages to use every analog and ADAT port on the Babyface, which gives me some kind of ?perverse? satisfaction that I'm getting the most out of the RME.

I was hoping to use the big rotary encoder to control the mix of ADAT channel that handles my Amazing Slow Downer input.

My general alternative to controlling the RME for things where I don't want to use a mouse is using a Faderfox EC4 (which is routed through Cantabile, then LoopMIDI) to control TotalMix over MIDI, which works well, but the Big Encoder Knob would be more convenient ...

One thing I forgot to mention is that I have an ADAT loopback cable on my UCX and UFX interfaces, and was thinking of the same setup for my on-the-road BFP. This gives the capability of physically looping back ADAT outputs so that they appear as physical ADAT inputs. The latency cost is pretty low - I think it cost 5-8 samples worth of latency at 48 KHz, if I recall correctly.

Here's the thread, with the use case for the loopback cable described in the first post and the latency measurements provided in later posts (6 samples @ 48K):

  https://forum.rme-audio.de/viewtopic.php?id=35864