This usually occurs to me when the kick drum is too loud. Those low frequencies blur up the bottom end and definition and pitch go out the window. I was at a reggae concert with two bands over the weekend. The first band was a quartet with the kick drum audible but not chest thumping. The bass was nice and clear. The second band had 13 or 14 members and the kick was double the volume at least. The bass was audible but not remotely close to as clear as the first band. Some HPF'ing may have helped but I think once the kick drum hits certain room resonances and the volume is up, the bass player is going to have a hard time being heard without drastic EQ changes. And those changes may encroach on the guitars and keyboards so ¯\_(ツ)_/¯.I've been to 4 live shows in medium-to-large venues in the last couple of years. They included smallish indy acts, Ween, and the Cure.
In all cases the bass sound was insufferably bad, and in the same way: a subwoofery drone that shook the seats but had no definition, and no real sense of pitch. Clearly this was the work of the sound people and not the bassists.
All these shows were in Philly, where I've been spending my time lately, so I thought maybe it was a local thing. But my friend who went to a couple of these shows with said, "no, it's everywhere." He's a former professional touring guitarist, and he gets out more than I do.
What's going on? Is this your experience too?
Apologies if this has been complained about already ... I didn't know how to search for it.