xstatic said:
Compression on the way in should be done for tone shaping purposes. It does not need to be there for signal level. If the level is too hot, don't just compress it....Turn It Down!
My point was that the compressor should only come out in tracking when you know you need it for a certain purpose. The question asked leads me to believe that the original poster does not have a specific need or want, otherwise the question really would not need to be asked. This means that compression should wait until mixdown. That way if he/she had an error in judgement, than all is not lost. It's just basic recording technique.
Cheers and bravo on the second part of the above quote. The only answer to "which should I compress" is "the ones that need compression". Ones that don't need it should not get it.
I do, though, have a couple of technical disagreements with the first paragraph in the quote:
First, while there is no hard core right and wrong on this one, IMHO "tone shaping" via compression is something that, when feasable, should be left for the mixing stage. "Tone shaping" via compression is something that I want an "undo" path on, not something that I'm stuck with once I find that the shape doesn't match as I expected once I get it in the same room as all the other tracks.
Second, you're right when you say that compression shouldn't be used during tracking if the levels are simply too hot. If the gain is too high, turn it down, don't compress it. If the levels are
too dynamic, however, then a compressor is the right and only tool for the job. Just using standard volume gain on something that's too dynamic is going to bury the quiet side of the dynamics down in low-res land near the floor. One needs to compress the overly-dynamic signal to be able to tame the volume without losing the quiet stuff.
This is, in fact probably the single most solid case I can think of for using compression during tracking. One wouldn't want to over-use it, of course. But in those instances where the average dynamic range of the raw signal approaches 40dB or more or has overly-strong transients that shoot 60 or 70dB or more up, some taming of those shrews would be a good idea before it hits the converters.
Other than that, leave the compressors on the sidline until the second quarter (tracking)

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IMHO etc.
G.