To your second question , Yes.
the fixed the placement of the analog compressor in the M16 and M24 prior to the send switch (PC or MTR) means it’s ONLY possible to use the compressors in the initial recording of a live input. Think of it as part of your pre amp, along with HPF. This is VERY frustrating, and something we’d all like to see updated in future.
The Model 12 has (very nice) digital compressors and it’s selectable as to whether it’s before or after the send switch.
Now, as to your first question, help me understand ... are you trying to go DAW-M16-DAW all in one real time play through?
meaning you are pressing ”play”’in your DAW and sending tracks 1-14 out from the DAW back to the M16, then sending the mixed master BACK to the DAW...all at once?
You probably can do it (by creating a new set of tracks in Abelton to receive and record the master outs of the M16). But I suspect you are going to get some pretty bad latency issues due to the various DAC and ADC steps plus the USB. What come back to DAW will be out of synch with what originate from your DAW...? Also you are pushing a crap ton of data through that usb cable in two directions... may hit the processing limits of your PC.
So I do everything in steps:
Step 1 - Playback a bunch of tracks from
DAW (which I’ve doctored with effects and plugins) to M16 via sends, saving the tracks onto the M16’s MTR as the DAW plays*. I use a new song file for this, separate from the original song where I captured the tracks prior to importing to DAW.
(*or you u can listen to the summed mix at this stage to play with compression and EQ before recommitting the tracks to “tape”).
Step 2. Use MTR playback and record on the M16 to capture the DAW outs. Once recorded I playback and make some final adjustments and mix tweaks, including practiced live fader moves, then when I am happy, I save and EXPORT the stereo 2 track master mix down file.
step 3 I use storage mode or SD card file transfer to bring that final stereo master 2 mixdown back into my DAW for final trimming and mastering. This is usually just a level adjust and perhaps a touch of compression to make it loud enough but not too loud. I use Mixbus as my DAW and it has some really tools for this step built in to get me to serviceable results.
Sound complex but it’s not bad, and kind of
Fun.
Does it improve the sound vs staying in the DAW... well.... I think so, it’s there and it’s good for my music style which is blues rock, but it’s subtle.
I do it as much for the tactile reality of it...
Again, it’s really too bad about those compressors since that’s the part of mixing that I find the most challenging to get. The compression on each instrument track interacts with the others in the summed mix to create rhythm and textures etc. I find it very hard to do this in a DAW...probably because I don’t have a really sound professional basis of knowledge and experience for my attempts!
but on the M12 (only) find I can twist the compressor knobs and listen until it sounds good...