protools compressor attack / release issue

Hi,

I can't register on the avid forums - a bug preventing new registrations (check "I agree to terms" and next page shows error message a field has been left blank).

I know some people on this forum are protools people so I thought i'd ask here.

I'm trying to put together a bit of a tutorial for some new techs. I've recorded pink noise in three 1 second segments; 1st and last segment are at -12dB; middle segment at -6dB.

Compressor settings set to knee 0, attack 300ms, gain 0; ratio 6:1, release 5.0ms, threshold -12dB.

The purpose of this part of the exercise is to show what the attack does. I'm expecting that when the middle section hits the compressor, it will ramp down over a 300ms period. Because this is a 1 second section, this is approx 1/3 of the way in.

To demonstrate the output i'm recording the result to a second track.

Thing is, with this setting it doesn't ever compress. If I change the attack to 10ms I barely get any compression at all - less than db.

is my understanding of attack wrong or is this some kind of flaw in protools ?

Moving onto release, I set the release to 500ms and i'm expecting as soon as the 3rd section hits, the audio will be compressed and ramp up over 500ms - which is approx 1/2 of the last section.

As evidenced in the attached pic, the release is more like 200ms.

As stated, i'm trying to get a visual tutorial going - I have no desire to compress pink noise in a real environment !

Help ?
 

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  • protools_pink_release.JPG
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