Hello.
From my understanding MAGC will match the loudness of the sidechain to the output.
In MXXX I set up a simple noise generator followed by a band pass filter (200hz HP - 2,000hz LP)
I fed the signal pre FX into the sidechain of MAGC and the signal post FX into the input.
I expected the intergreated loudness to be the same for the dry noise and the output of MAGC, but they were quite different.
Can anyone spot a mistake, or something I'm missing?
Thanks, Jason.
MAGC confusion
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- KVRAF
- 10375 posts since 2 Sep, 2003 from Surrey, UK
The bandpass filter reduces the "loudness" of the signal (calculated across the whole spectrum) that is sent to AGC's sidechain, so its output will be less too. Here I've added 3 MMultiAnaylzers to see what's happening:
>>> http://i.imgur.com/tXNrmgU.png
As you widen the Band-Pass the AGC Output level will rise.
>>> http://i.imgur.com/tXNrmgU.pngAs you widen the Band-Pass the AGC Output level will rise.
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- KVRAF
- Topic Starter
- 2702 posts since 9 Jul, 2015 from UK
DarkStar wrote:The bandpass filter reduces the "loudness" of the signal (calculated across the whole spectrum) that is sent to AGC's sidechain, so its output will be less too. Here I've added 3 MMultiAnaylzers to see what's happening:
As you widen the Band-Pass the AGC Output level will rise.
Not quite. I have the sidechain pre and the input post.
Jason @ Melda Production
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- KVRAF
- 10375 posts since 2 Sep, 2003 from Surrey, UK
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- KVRAF
- Topic Starter
- 2702 posts since 9 Jul, 2015 from UK
I'll try to get one over but might take a while I'm away. But to be honest, its exactly as you have it already. Just switch the input and sidechain. Thanks for looking at thisDarkStar wrote:Oops. I mis-read. Got a preset?
Jason @ Melda Production
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- KVRAF
- Topic Starter
- 2702 posts since 9 Jul, 2015 from UK
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- KVRAF
- Topic Starter
- 2702 posts since 9 Jul, 2015 from UK
As you can see the intergrated loudness is different pre and post. I thought the plugin was supposed to make them the same?
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Jason @ Melda Production
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- KVRAF
- 10375 posts since 2 Sep, 2003 from Surrey, UK
It aims to make them close (I'll guess that the levels would only be the same with in-phase identical frequency sine waves).
While you were doing that I switched the inputs to MAGC: the band-passed noise goes to the main input and the full noise to the sidechain input
>>> http://i.imgur.com/TVTxLEI.png
With the Band-pass module (what is the correct term for each of this loaded elements?) bypassed the MAGC input (blue), sidechain (red) and output (green) were all the same. When I enable the Band_pass the output gets louder.
I see a similar result with your preset: I get 18.3 LU and 16.1 LU, so the Post level is slightly quieter (With my set-up the levels are -10.3LU and -9.9 LU so the "post" level is slightly higher (and "close enough for jazz")).
While you were doing that I switched the inputs to MAGC: the band-passed noise goes to the main input and the full noise to the sidechain input
>>> http://i.imgur.com/TVTxLEI.pngWith the Band-pass module (what is the correct term for each of this loaded elements?) bypassed the MAGC input (blue), sidechain (red) and output (green) were all the same. When I enable the Band_pass the output gets louder.
I see a similar result with your preset: I get 18.3 LU and 16.1 LU, so the Post level is slightly quieter (With my set-up the levels are -10.3LU and -9.9 LU so the "post" level is slightly higher (and "close enough for jazz")).
Last edited by DarkStar on Fri Jun 17, 2016 3:27 pm, edited 1 time in total.
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- KVRAF
- Topic Starter
- 2702 posts since 9 Jul, 2015 from UK
DarkStar wrote:It aims to make them close (I'll guess that the levels owuld only be the same with in-phase identical frequency sine waves).
I'll be disappointed if that is correct. I don't feel that those are close enough. I can't understand why they can't be the same.
Jason @ Melda Production
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- KVRAF
- 10375 posts since 2 Sep, 2003 from Surrey, UK
^^^
Try it out with MOscillator instead of MNoiseGenerator; then add MUtility to vary the sidechain level.
We need the V-meister to shed some light
Try it out with MOscillator instead of MNoiseGenerator; then add MUtility to vary the sidechain level.
We need the V-meister to shed some light
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- KVRAF
- 10375 posts since 2 Sep, 2003 from Surrey, UK
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MeldaProduction MeldaProduction https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=176122 - KVRAF
- 14339 posts since 15 Mar, 2008 from Czech republic
Hehe what help do you need? 
I don't really have time to read every topic on KVR
EDIT: I read the few posts above and sorry I have no idea what on earth are you trying to do. How is integrated loudness relevant here??? We are changing temporary loudness with some specific window, that does NOT (!!!!!!!!!!!!!!!!!!!!!!!!!) mean the integrated loudness will be the same obviously.
I don't really have time to read every topic on KVR EDIT: I read the few posts above and sorry I have no idea what on earth are you trying to do. How is integrated loudness relevant here??? We are changing temporary loudness with some specific window, that does NOT (!!!!!!!!!!!!!!!!!!!!!!!!!) mean the integrated loudness will be the same obviously.
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- KVRAF
- Topic Starter
- 2702 posts since 9 Jul, 2015 from UK
OK, I understand now. I forgot it was a temporary loudness adjustment. I had a brain fart. Thanks for explaining.MeldaProduction wrote:Hehe what help do you need?
EDIT: I read the few posts above and sorry I have no idea what on earth are you trying to do. How is integrated loudness relevant here??? We are changing temporary loudness with some specific window, that does NOT (!!!!!!!!!!!!!!!!!!!!!!!!!) mean the integrated loudness will be the same obviously.
Jason @ Melda Production