I think the best way in that case is to mic it up his way *and* your way, and then do a mix with both versions. If you want to be a prick, you can always mix it so your version sounds better. But what the hell? You never know. You might end up liking his way better.-Richie
This. Admittedly, I'm not a "pro" engineer myself, but I definitely spend a lot of time micing up my amp, so I have a pretty good idea what
I like.
As a guitarist, I'd certainly let the engineer do his thing, but if after hearing the results I wasn't digging it, I certainly wouldn't feel like I was overstepping my bounds by saying, "listen, that's cool but it's not really the sound I'm after. I've had pretty good luck in the past with this mic, positioned here. Can we try a take or two like that, as well?"
As an engineer, I'd look at it almost the same way. The guitarist obviously has a better idea of the tone he's after than I do, so while I might be doing something
my way, there's a pretty good chance that this won't get him exactly where he's after, and a not-insignificant chance that he might actually know enough about recording to have some idea how to get the sound he's after. So, again, I think the appropriate response is, "Ok, cool - I've had really good results tracking guitars for the sound you're after in the past this way, so since we lose nothing by trying, let's do a couple takes your way and a couple takes my way, and then listen and see what's working for you.
Hell, if you have available tracks/mics, record everything both ways, and then you have that many more options in the mix. You don't even have to
tell the guy which version you used.
That said, if you don't, at this point it (speaking to Glen's point in another recent thread) comes down to the producer's call. If that's the guitarist and he still prefers his way, then do that. If it's you, then listen objectively. If they're both pretty good but the guitarist digs the other way a bit more and you don't think it'll cause problems elsewhere in the mix, then you may as well consider doing it. If you honestly, objectively think your approach is better, then do it. And hell, maybe the guy actually lo and behold knew what he was doing and you're listening back through the monitors and digging the shit out of the tone - congratulations, you just learned a new approach to recording guitars. Even the best of us can still learn.