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Distortion under heavy compression
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Hagiazo
Prenoob

Joined: 13/08/2011 22:40:02
Messages: 4
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I recently experienced a lot of distortion while using compression on an acoustic guitar. When I backed off the threshold level it went away. Is that normal?

I'm using the 16.4.2AI with updated firmware.
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Presonoid
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Joined: 17/02/2011 01:10:03
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Well, that's what compression does, it changes the shape of the signal. Peaks get flatter which adds harmonics. The higher the ratio the more audible it becomes. Raising the threshold means that only higher peaks get squashed (fewer peaks = less eminent) until the threshold is higher than the highest peaks. That's where the compressor stops doing anything, and no compression = no distortion.
gadget69
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Joined: 21/09/2010 03:56:19
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Kind of depends how much compression you were using.. what were the parameters, and where were you hearing the distortion?
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Hagiazo
Prenoob

Joined: 13/08/2011 22:40:02
Messages: 4
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3:1 - low threshold - very fast attack and release - I can be more specific when I get in front of the board this weekend. Distortion was coming through the mains, monitor and solo on headphones from the acoustic guitar channel (7).

I've been mixing live for a very long time, not to say that I'm an expert I still have lots to learn, but I've never heard distortion, the kind you would hear from a distortion pedal on an electric guitar, come from using compression.

Thanks for your help.

Dan
jonathangrimm
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Joined: 10/06/2014 17:47:25
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I too have been able to get the compressor to distort. If compression is an important tool in your bag of tricks, I would just bust out your old favorite analog compressor and use the channel inserts. You can not count on this compressor to brickwall (the math in the software hits its own limits and fails with distortion) , and you have to watch your input level for clipping as you will need much more input than you might be used to in order to get the compressor to start to engage. We just bought one of these and I have been pushing the limits and testing everything on the test bench before I pull out our old Mackie an put the new mixer on line.
Hagiazo
Prenoob

Joined: 13/08/2011 22:40:02
Messages: 4
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Thanks for sharing. it made no sense to me that I could distort the compressor that way and I also have noticed that i have to either crank the input or be strong on the threshold to get it to compress. In fact I have to crank the gains on some channels, vocals usually, much more that I expected.

Disappointed with that stuff, loving the board otherwise.
 
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