^^^^^^^^^^^^
While I agree with many points made in this great post I'd like to point to the following:.
John Macy wrote:
Don't forget in BIB those guitars are achieving some pretty massive tube compression in the way they are driven, not to mention the tape compression from the multi tracks. I think a lot of the sound of that record is that balance of the smashed guitars and the dynamic drums...killer record!
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Not trying to be argumentative but I disagree. AC-DCs guitar tones are NOT smashed, neither at the amps nor on tape. Yes, they are distorted and compressed BUT actually to a much lesser degree than most folks assume. They use NMV Marshalls and the tone is dirty and raw but the amount of overdrive and saturation is relatively small, most of their playing dynamics is retained even though the wireless unit that Angus used in the studio (an old Vega) added some unique crunch, but only ever so slightly. Tony Platt also said repeatedly that they always tried to keep tape saturation to a minimum. They used the MCI MTR to record and a Studer for playback during mixing because it gave them the cleanest signal. I take that as meaning that they strived for the recorder to impart as little influence on the signals transient and frequency response as possible when compared to the sounds being fed into it. that was the goal for many engineers back in the day although lots of studios and engineers also had tricks up their sleeve to line up their MTRs for a signature sound. I just don't believe it was done here. I know I'm going out on a limb here but IMO guys like Tony were keenly aware of tape's "pitfalls" and had a lot of experience in mitigating them in order to get a transparent recording. No wonder that many of the old time engineers were delighted when digital came along because it did away with those tape artifacts.
I'm even willing to speculate that if BIB were recorded today Tony Platt wouldn't use tape at all and get the same or better results. When I hear AC-DC's guitars I hear a lot of natural transient response , captured by a reasonably fast large diaphragm condenser , which is why they have the best guitar sound in Rock and Roll.
John Macy wrote:
Part of the beauty of hardware compressors is the sound they impart due to the electronics they were built with--something that plugins will never achieve. Tubes, transformers and the like all can have a great effect on the sound, while barely touching the compression aspect. The UREI 1176 has a option to turn off the compression completely, but still capture the sound of the unit.
Again I disagree, a good plug in emulation of a hardware comp theoretically would take all those factors into account and include them in the emulation. How close to the real thing is it? Really depends on who you talk to but to say it'll NEVER achieve it is going too far IMHO. FWIW, by far my favorite comp is integrated in a digital console(Euphonix System 5, really puts everything I've ever used to shame) and the plug in emulation sucks (Avid channel strip) so that tells me that it's not the analog hardware vs plug-in difference but the quality of the emulation itself that matters. YMMV of course and I do agree that in many cases the plug ins don't get anywhere close to the hardware box. I've never heard an 1176 plug in that sounds remotely like the real deal.