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hvz
PostPosted: Thu Jan 24, 2013 2:01 pm 
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Ok I did a bunch of tests, so far I hear no negative effect of the attack change. So maybe it's good this way.
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gpagliaroli
PostPosted: Thu Jan 24, 2013 2:29 pm 
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A query, you are using look-ahead at the compressor?
No, not yet. But the RMS smoothing algorithm should reduce the need for one.
It is true that aid in smoothing RMS since discarded isolated peaks, but the look-ahead helps anticipate abrupt and start before compression. That improves even more.
But first without look-ahead and when the correct behavior will add the details :)

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Bojcha
PostPosted: Thu Jan 24, 2013 2:39 pm 
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Now compressor goes into Hard Clip with Inf:1 and atack under 4ms. FF / Peak.
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gpagliaroli
PostPosted: Thu Jan 24, 2013 2:44 pm 
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Now compressor goes into Hard Clip with Inf:1 and atack under 4ms. FF / Peak.
That's right, for this configuration, since the ratio is really high 1000:1 :roll:

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gpagliaroli
PostPosted: Thu Jan 24, 2013 3:27 pm 
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http://musicdsp.org/archive.php?classid=0#169
This is indeed VERY interesting (and different from what I do!):
Code:
        // dynamic selection: attack or release?
        double  theta = rms > env ? att : rel;

        // smoothing with capacitor, envelope extraction...
        // here be aware of pIV denormal numbers glitch
        env = (1.0 - theta) * rms + theta * env;

        // the very easy hard knee 1:N compressor
        double  gain = 1.0;
        if (env > threshold)
            gain = gain - (env - threshold) * slope;

Edit: Ok, got it now. Current code is wrong. I'm calculating attack and release on the gain! Will fix it... Again.. :(
@Hans: I sent you a pm you can help 8-)

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hvz
PostPosted: Thu Jan 24, 2013 3:35 pm 
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Now compressor goes into Hard Clip with Inf:1 and atack under 4ms. FF / Peak.
That's right, for this configuration, since the ratio is really high 1000:1 :roll:
No, release is wrong. Even at a release of 100 seconds it looks clipped.

Aaah... Was switching to Attack mode as soon as the measured signal is above threshold... Must be if it's above envelope!
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gpagliaroli
PostPosted: Thu Jan 24, 2013 3:39 pm 
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Now compressor goes into Hard Clip with Inf:1 and atack under 4ms. FF / Peak.
That's right, for this configuration, since the ratio is really high 1000:1 :roll:
No, release is wrong. Even at a release of 100 seconds it looks clipped.
ok, then something is wrong ... :cry:

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hvz
PostPosted: Thu Jan 24, 2013 3:45 pm 
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You responded before I did:
Aaah... Was switching to Attack mode as soon as the measured signal is above threshold... Must be if it's above envelope!
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gpagliaroli
PostPosted: Thu Jan 24, 2013 4:07 pm 
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You responded before I did:
Aaah... Was switching to Attack mode as soon as the measured signal is above threshold... Must be if it's above envelope!
Is true, this can be observed in the current beta, adjusting Release to a high value and observing the gain reduction VU.

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Brian
PostPosted: Thu Jan 24, 2013 4:37 pm 

Joined: Sun Dec 12, 2010 2:26 pm
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Ok I did a bunch of tests, so far I hear no negative effect of the attack change. So maybe it's good this way.
Still can't really participate here because of cpu load, however, a question:

Is the goal here to use this singleband as the individual band filter for multiband similar to now?
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