No big deal, but if there's ever an update to TotalMix to address this I'd be grateful! Thanks RME!

I used a StremDeck, but you could use any kind of midi controller to do this.

Enable midi control using an IAC buss in Totalmix.  (F3 or Settings)
Setup a MIDI button in Streamdeck software that in my case SNAPSHOT 5 was my SpeakerB out.
- the midi command to change to Snapshot2 is note on 55 velocity 1.
- I would then use MIDI learn in SoundID to also trigger the B speakers profile/preset in SoundID.
Works a treat. 
I've now moved onto an even more elaborate setup with 7.1.4, but this should get ya going and as I mentioned, you could use any manner of MIDI controller to do such, even a virtual one.

the snapshots are no solution as mentioned above.

I have to have couple things wired to my speakerB-speakers independently, but its just not possible.

Yep - I can see how that would work too. Thanks for the tips.

It's annoying that this use case isn't catered for - for me it's a serious workflow killer.

That said, I'm mightily impressed with TotalMix. After 2 days of mucking around with it, there doesn't seem to be anything it can't do. Yeah, in this case I had to find a convoluted workaround, but in the end I did find one! It's so good I was expecting it to be perfect!

James

My workaround was making 2 snapshots, one with Speaker A path assigned as main, the second one with Speaker B path assigned to main.
You can can fader groups between the 2 outputs (say you main output is speaker A at the moment, you edit a fader group for volume and link the main volume fader to the fader volume of the second pair of monitors output). The link will be kept regardless of snapshots. You'll know it's linked once these 2 faders turn red in Totalmix.

The second thing is to replace the Speaker B button on the Arc Usb to trigger Snapshot 2, which is the one which should have Speaker B as main out.

Hope this helps, apparently RME doesn't want to waste time helping us with this very small feature request, which, if you ask me, should have been there by default.

Cezar

Physical setup
UCXII with Analog 1/2 connected to my Main Monitors and Analog 3/4 connected to my Second Monitors
ARC USB

DAW setup.
This is for Cubase but should be similar in other DAW's
1) In Cubase Control Room route your Main Monitor as as normal (UCXII - Analog 1/2)
2) Add a Cue Mix and route it to your Second Monitor (UCXII - Analog 3/4)
3) Add in EQ correction as required to each output as required

TotalMix setup
1) Set up two Snapshots, one for the Main Monitors, one for the Second Monitors. I've saved them in SNAP7 (for my Mains) and SNAP8 (For my Seconds)
2) SNAP7 (Mains)
- In the TotalMix Control Room assign Main Out B to your Second Monitor outputs (I'm using Analog 3/4)
- Make sure the 'Speaker B' button is not enabled (so it's grey)
- In the Software Playback section turn up the faders to 0dB for 'Analog 1/2' and 'Analog 3/4'.
- In the Software Playback section mute 'Analog 3/4'
- Store the snapshot in SNAP7 and SNAP8
3) SNAP8 (Seconds)
- In the TotalMix Control Room assign Main Out B to your Second Monitor outputs (I'm using Analog 3/4)
- Make sure the 'Speaker B' button is enabled (so it's orange)
- In the Software Playback section mute 'Analog 1/2' and unmute 'Analog 3/4'
- Store the snapshot in SNAP8
4) In either snapshot, adjust the volume levels until they are balanced. You can do this by:
- unlink the faders by clicking the orange 'Link' button on Analog 3/4 in the Control Room
- adjust levels
- check balance
- repeat

This gives me exactly what I need. One button press to switch between monitors (SNAP7/SNAP8) and the ARC USB rotary knob controls volume for both.

Old setup
I use Cubase with Control Room enabled.
Each pair of Monitors had it's own EQ correction applied via the Sonarworks plugin.
I have them volume balanced and can flip between them using the A/B buttons in Cubase Control Room
Overall volume is controlled via the rotary knob on the front of the MR816

I can't get this to work smoothly with TotalMix. When I flip between channels in Cubase I have to flip between Main and Speaker B in TotalMix (using the ARC). This wouldn't be a problem if I could have different submixes for Main and Speaker B. That doesn't seem to be possible at the moment.

A workaround would be to use one of the Phones outputs in the TotalMix Control Room as my second monitor. I can then route a Cue Mix from Cubase to this. But then I can't control the volume of the second monitor with the ARC USB. If I could link faders in the TotalMix Control Room then this would be an excellent solution.

So, I've gone from having one button to switch monitors and one volume control to either:
a) Needing to keep Cubase and Totalmix monitors in sync to make sure the EQ correction is correct
b) Needing to manually adjust the volume of the second speakers in TotalMix

So - two feature requests:
1) The ability to have separate submixes for Main and Speaker B (preferred)
2) The ability to link faders in the TotalMix Control Room

Make sense?

Hi Cezar,

when deselecting/deactivating the "link" button (right beside "Mono" button) of Speaker B, then I can move the fader of "Main Out" and "Speaker B" individually.

When selecting the two different HW Ouputs "Main Out" / "Speaker B", then I see different submixes.

If I do not want to have SW Playback AN 1/2 for Speaker B, then I turn the fader of Speaker B down and then it is not part of the submix anymore. Click to sub on the right side to see only channels that route into this submix/hw output.

Sorry, at the moment I do not see the/a problem. TM FX 1.72 here.

Would it be possible for you to provide a Youtube video ? Maybe it's then easier to understand.
At the moment "the penny doesn't drop".

Here you go, dude

Main Out ->Analog 1-2
Speaker B -> AES

Note that the LINK button on speaker B is NOT activated.
TM FX 1.72

https://www.youtube.com/watch?v=YfMF8LUGN78

when deselecting/deactivating the "link" button (right beside "Mono" button) of Speaker B, then I can move the fader of "Main Out" and "Speaker B" individually.

When selecting the two different HW Ouputs "Main Out" / "Speaker B", then I see different submixes.

If I do not want to have SW Playback AN 1/2 for Speaker B, then I turn the fader of Speaker B down and then it is not part of the submix anymore. Click to sub on the right side to see only channels that route into this submix/hw output.

Sorry, at the moment I do not see the/a problem. TM FX 1.72 here.

Would it be possible for you to provide a Youtube video ? Maybe it's then easier to understand.
At the moment "the penny doesn't drop".

It should be possible to route the final audio to two different outputs, e.g. AN 1/2 OUT AN 3/4 OUT
In TM FX Full mode audio will arrive on SW Playback Channel AN1/2 (with calibration 1) and AN3/4 (with calibration 2).
Assign AN1/2 to Main Out
Assign An3/4 to Main Out B
Toggle between "Main Out" and "Main Out B" by selecting and releaseing "Speaker B" with the mouse.
Or use the "Speaker B" key of your ARC USB.

It isn't, you don't need audio to do this experiment, just assign a second speaker B and try controlling the playback fader, for example, to Main Out(analog 1-2 or whatever you have assigned) and notice that it will automatically put the fader in the same position to Speaker B (analog 3-2 or whatever other channel you have assigned it to).

The problem is that when you assign a Speaker B(Main Out B) you can't select only one of them(and I'm not talking about volume link or the totalmix wrench/eq/dynamic settings, these work separately, as expected).

Try it and let us know if me or the OP are complaining for no reason.

Such a feature will not come. You can easily do this right now by mirroring the Main to another output and use Mute on both outputs alternating.

I'm sorry,"a feature" should be linking the Main Out to Speaker B software routing, not unlinking them.

It's 2021 and more and more studios are using speaker room calibration and have 2 sets of speakers.

Of course there's a workaround with snapshots, but that will affect the whole mix inside that snapshot, which is something neither of us want.

The second alternative is to buy an external monitor controller with 2 separate stereo inputs and 2 outputs, but I already bought ARC USB.

So why would you dismiss this request?

I'm routing through Control Room in Cubase to 2 different stereo outputs, each one has its' own calibration vst. What am I supposed to do in this situation?

Hope that helps