Maybe this can be useful for other SQ-owners until there´s a good setup guide from A&H available.
It seems like CbB/Sonar and SQ-series do not like each other very much at this point in time.
I was in contact with A&H´s Support (Alex) who gave this answer:
"
Unfortunately, I am not familiar with that DAW and I do not have access to it on my system, however, I can make sure the mixer is set up correctly.
In the DAW Control Driver, MIDI ports should be selected with SQ MIDI In and Out.
To add MIDI channels to a layer on SQ, go to Setup > Surface > Strip Assign and then select DCA/MIDI on the top right and the layer you would like them assign them to. You can then drag and drop up to 32 MIDI channel strips over 2 layers."
I saved this as a scene "DAW" in the SQ-5 for quick switching between DAW/Live.
After trying a couple of configurations I got them to kind of work together.
A&H´s DAW Control is set to HUI and Midi ports.
I used Azslow3´s AZ Controller and in Options>Tweak Current Configuration set it to QU16/24/32 and let AZ Controller add a QU16 preset.
This allows me to control Channel, Mute and Solo buttons + Volume fader for each channel.
I´m not 100% sure, but I think I read somewhere that the Preamp/Eq-rotaries aren´t available for Midi-use, it would be great if I could use them to control PC-Eq & Gain.
Who knows maybe it´s user ignorance and I´ll figure it out later on - or a firmware update will make it possible.
I think the Soft Buttons should be available for midi though - my quest continues ...