And maybe you are right that one cant hear any difference in this case . I just compared with a more modern device .
If the gainstage is less than max (0 dB ) like If you use a digital volume control at the source set at -30 dB before the AES input on the Behringer - how will the jitter measurements be then ? I dont know for sure and maybe you and I cant hear any problems but its something thats been improved over the last 20 years.
Most people aren't that serious that are using this thing. If they can get a signal through it and it sounds OK, they're set.
How are we using the word improved? For me, improved - enough, means that problems are imperceptible. My friend used to respond to some kinds of inquiries this way, "it's a matter of mind over matter. If you don't mind, it don't matter." Once we pass the threshold of perceptibly, what does, "improvement" mean then? So, one device might have a 140db dynamic range and is otherwise perfect, and another similar device comes along, and it is also otherwise perfect, but(!) It has a dynamic range of 150db? Is the second device better? If there was a device that had 100db dynamic range, and otherwise measured "the same" as the 140-50db devices, but cost 50-75% less, I'd go with the 100db dynamic range, and I, and no human listening to my (good) system would ever notice any kind of a problem, assuming proper operation.
Me boasting about my (inexpensive) -140db headphone amp that I have, is like maintaining bragging rights on an unidentifiable, microscopic teacup, floating behind the Moon. Or maybe bragging about my piece of kelp at the bottom the Mariana Trench.
As far as all the modern levels, and all. I with my home recording setup up, I try to get as much level as I can in, without distorting, and normalize the signals before mixing them. I'm not at all a professional, but I did 72 track song for friends and family in 2018, and I was surprised how it sounded. I ahered to exactly zero "industry standars" that I knew of. I'll link it. If a person is a pro, I understand the desire and necessity of industry standards but are those people buying this unit?
Ken Creten Christmas song - 72 tracks, DAW: Mixcraft, Focusrite, Shure 57, Kemper amp, and other stuffs.