Apparently this guy has been recording concerts in Boston for decades, around 10,000 of them supposedly, and they’re now being cleaned up and put online:

https://archive.org/details/aadamjacobs

https://aadamjacobscollection.org/

Some big names in there, and a lot of stuff no one’s ever heard of. But the quality is often quite impressive no matter who it is.

I always find something slightly melancholy about this kind of thing - little snapshots of transient moments in youth culture, gone forever.

Interesting to sift through, though!