Did some trial and error today and figured it out. I have to complain about the UI at this point not showing you what the signal flow (Stereo/Mono) really is underneath.
As far as I understand all signals are always stereo, thats also why u can only set USB7/8 as input and no Mono USB.
To achieve same level as your guitar you actually need to set DI recording to USB7 and 8 and record both to a stereo track, becaus if you record your guitar through an empty patch to a stereo USB1/2 in this is exactly what you get when recording DI to USB7 AND 8.
for re-amping put the outs of this stereo track to USB7/8 and you are gain staging correctly/just as your guitar would.
if you only record USB7 mono DI and put out of the DAW track to USB7/8 pro tools does a split and lower the signal by -3dB and puts it on both tracks. first source of signal loss. this could be compensated by puttinfg the DI track to +3dB but its a source of error for me.
second possibility is setting the out of that mono track to USB 7 mono. with an empty patch this produces signal only on the left - with a MONo block that funtions as "monoizer" (like you would in a real patch) this happens wich nothing can be found about in the manual: Mono blocks sum the signals of the two channels together, compensate -6dB and then process and put the result on both channels. if you use the "mono method" (Di to USB7 only and re-amp through USB7 only) this means sinal loss of -6dB when going into a mono block.
I had to find all of this out with 5 hours of trial and error and I do not like how the user interface is "scientifically incorrect" to make it look more simple. i need things to be clean, precise and correct and for that i need to know whats actually going on.
I am thinking about making an in depth youtube video about this, but I'm not sure if it is worth the effort since it's hard to explain and it seems nobody really cares about this tedious stuff... what do you think?
