Noticed it too. Brian's stuff is really enjoyable and I like his YT channel and his podcast but I think it is pretty common for Youtubers to demo stuff without deep research since they have to be timely with content and typically go through a lot of gear demos quickly. Like you said, most of these modules it is not a big deal but some of the others it'd be a pretty big mistake.Yeah, I thought it was a bit odd that he set the lower (blue) channel to higher gain than the upper (red) channel a few times. On some of the modules, it doesn't matter, since the two channels are identical. But on others, if there is a difference, the top/red channel is always the one with higher gain and/or compression. I'm fairly certain that the modules he showed in this video have similar channels. I think...
I wondered on the Shirley... the IRL amp has a gain switch, so I figured the Red corresponds to a higher gain setting on that switch than the blue? Seems like BE and HBE are just single voicing though so maybe the whole thing is just expressed across the knob sweep.
Anyway I would be interested to hear any observations... I am researching Marshally modules this week... DS, Plexi, Metroplex... I tend to be more of a Plexi person but that DS has some serious flavor and it has me wondering. I had the 800 and am regretting flipping it now, too. Sheesh! Gotta prioritize my acquisition list/strategy.