I've engineered more that 250 recordings with a twin 24-track remote recording truck. I think may of the techniques used for live recording also apply to live sound.
Manytimes the multi-track masters were sent back to the label's producer/engineer.
I would usually call ahead and find out if they would like the sessions cut with or without EQ, how much compression, and what type of gear would they like to be used.
My own opinions were usually the same as the request.
For rock electric bass: RE20 (my favorite) but am also very happy with an MD-421
I think either of these could be found in the $200ish range on the used market. If you really want to buy a dedicated bass/drum mic, it's worth it.
I've also been asked to use a D-12 which I didn't love.
For jazz UB: With a quiet ensemble a U-87 or U47
With a louder group I'd see if I could sneak a gobo in to control bleed.
If not, then the RE20 was a decent choice
I do like having the ability to use a mic but would not say that it is always the best solution.
Very rarely was the mic'd track used alone, sometimes blended, and sometime not used at all.
Sometimes a dry DI sounded best and this was back when the best available was a Countryman 85 (which I still use depending on the application). For passive, I liked the old blue Sescom's that had Jensen transformers.
If the player requested a DI be taken from the amp, I would still run my own DI with it.
I wouldn't try an untested amp DI on my watch. If it failed in any way, it would have been my fault.
I like the opportunity to try a mic on bass during soundcheck but as an opening act, that isn't always a possibility. Bottom line, if you could only use one source, the DI was most important.
Stupidest request:
Use Monster Cable from the stereo out buss to broadcast / 2-track mix for a guest engineer.
Apparently 5,000+ feet of Belden mic and snake cable was OK for the inputs but not for the stereo mix.
We got to use regular TT for the patch bay too.
Go figure
Andy; is the live mix school of thought still to use a passive DI on an active bass, and, an active DI on a passive bass?