How does the detection of stereo compressor works?
How does the detection of stereo compressor works?
There is a stereo compressor on a stereo signal. What triggers the compressor? Is it L, or R, or Mid?
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- owen841130
New here - Posts: 12 Joined: Wed May 04, 2022 2:02 pm
Re: How does the detection of stereo compressor works?
Different designs work in different ways.
Most take the output of whichever channel produces the greatest control signal, and share that with both attenuators. So the loudest of left or right at each moment controls the gain reduction of both channels.
However, some units -- notably permanent stereo compressors, rather than linked mono compressors -- sum the left and right inputs and feed that through a single side chain to control both channels.
Most take the output of whichever channel produces the greatest control signal, and share that with both attenuators. So the loudest of left or right at each moment controls the gain reduction of both channels.
However, some units -- notably permanent stereo compressors, rather than linked mono compressors -- sum the left and right inputs and feed that through a single side chain to control both channels.
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- Hugh Robjohns
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(But generally posting my own personal views and not necessarily those of SOS, the company or the magazine!)
In my world, things get less strange when I read the manual...
Re: How does the detection of stereo compressor works?
Wow thank you, that seems to be the case.
By the way, can you please give some examples of the compressor that uses the sum of left and right as a side chain. I have tried many compressors in my DAW, all of them are the first type.
By the way, can you please give some examples of the compressor that uses the sum of left and right as a side chain. I have tried many compressors in my DAW, all of them are the first type.
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- owen841130
New here - Posts: 12 Joined: Wed May 04, 2022 2:02 pm
Re: How does the detection of stereo compressor works?
...I know...
By the way, can you please give some examples of the compressor that uses the sum of left and right as a side chain. I have tried many compressors in my DAW, all of them are the first type.
SSL's new Bus+ offers the summed mono mode as a selectable option. https://www.soundonsound.com/reviews/ssl-the-bus-plus
The API 529 uses a power-summed input to the single side-chain.
Other examples aren't leaping immediately to mind, but it will only be permanent stereo models as I said previously -- so mostly bus compressors.
In practice, there isn't much audible difference between greater channel and summed mono modes with typical music applications, although very wide stereo effects can mess things up a bit!
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- Hugh Robjohns
Moderator -
Posts: 43690 Joined: Fri Jul 25, 2003 12:00 am
Location: Worcestershire, UK
Contact:
Technical Editor, Sound On Sound...
(But generally posting my own personal views and not necessarily those of SOS, the company or the magazine!)
In my world, things get less strange when I read the manual...
(But generally posting my own personal views and not necessarily those of SOS, the company or the magazine!)
In my world, things get less strange when I read the manual...
Re: How does the detection of stereo compressor works?
Thank you for the detailed answer. You can't imagine how long I've been looking for these. Really appreciated it.
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- owen841130
New here - Posts: 12 Joined: Wed May 04, 2022 2:02 pm