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Fairchild 670 - history and how it works

With the advent of classic gain reduction units in software/ plugin form, I thought I would start a series of threads explaining how these original classic units worked - kind of a "what makes them tick" series of threads, for those who are using emulations from companies like UAD, T-Racks/IK Multimedia, Waves, Bomb Factory, Steinberg, etc.

compressor plugins vs real compressor

I was recording last night with a new preamp that I built (Telefunken V-72) and I am getting pretty good sounding recordings now using Pro Tools. When I add a compressor using the various plugins that come with Pro Tools LE it seems to me that they are actually degrading the sound and reducing the gain.