Thread: Negative Compression Ratio?

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  1. #1
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    Default Negative Compression Ratio?

    I have a compression plugin that allows you to go into the negatives for ratio... I dont really understand what this does? What can you use this for? thanks!
  2. #2
    Frustrated Chick Rock singer...now doing jazz standards poorly! Yknee cnut
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    Default Re: Negative Compression Ratio?

    expansion?
  3. #3
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    Default Re: Negative Compression Ratio?

    Inflation?





    wait, that's the opposite of depression...

    How about expansion?
  4. #4
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    Default Re: Negative Compression Ratio?

    Think of expansion as the opposite of compression. Basically it increases the dynamic range. Anything below the threshold gets it's volume decreased by whatever ratio you've got going on.
  5. #5
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    Default Re: Negative Compression Ratio?

    What plugin is it? Usually expansion in compressor plugins will be notated by a ratio of 0.1-0.99:1.
    Andrew MacRae
  6. #6
    Goodbye Yellow Brick Roadhouse Blues Always picked last for sports
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    Default Re: Negative Compression Ratio?

    That shouldn't be expansion. Negative ratio means that above the threshold the level would actually decrease.
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  7. #7
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    Default

    Think of expansion as the opposite of compression. Basically it increases the dynamic range. Anything below the threshold gets it's volume decreased by whatever ratio you've got going on.

    You have both upwards (which can be useful to bring out low-level details without touching your peak dynamics) and downwards (what people refer to gates - a gate is a *hard* expander, with a ratio higher than say, 10:1).
  8. #8
    Junior assistant coffee maker trainee ACME recording engineer...just add water.
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    That shouldn't be expansion. Negative ratio means that above the threshold the level would actually decrease.
    Maybe that's what it is on some novel and obscure (but correctly expressed) plugin.

    I think maybe the Waves C1 refers to upwards expansion as negative *compression* ratio... :-(
  9. #9
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    Default Re: Negative Compression Ratio?

    Maybe that's what it is on some novel and obscure (but correctly expressed) plugin.

    I think maybe the Waves C1 refers to upwards expansion as negative *compression* ratio... :-(
    Nope the C1 refers to upward expansion as compression with ratios from 0.5:1 - 0.99:1 which makes sense. For example with 0.5:1, for every half dB above the threshold on input, you get a full dB of gain on the output.

    Negative ratios are for what they call "cancellation mode", which can make signals on the output severely lower than on the input, even below the threshold. I have yet to find a situation that this is useful for.
    Andrew MacRae
  10. #10
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    Default Re: Negative Compression Ratio?

    That shouldn't be expansion. Negative ratio means that above the threshold the level would actually decrease.
    Exactly.
    Andrew MacRae
  11. #11
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    Default Re: Negative Compression Ratio?

    I'm sorry, did you guys mistake 0.1 - 0.99 as negative numbers?

    As far as I can tell, they're still above 0...
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  12. #12
    Blonde on Blonde is a record? Calls Football Soccer
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    Default Re: Negative Compression Ratio?

    That shouldn't be expansion. Negative ratio means that above the threshold the level would actually decrease.
    Right.

    ∞:1: no change in output level regardless of input.
    Negative ratio: output decreases when input increases.
    Positive ratio: output increases when input increases.

    Cheers
    Originally Posted by Slipperman
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    Default Re: Negative Compression Ratio?

    Man! You have GOT to try a hit of this RANGE SUNSHINE!

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  14. #14
    Blonde on Blonde is a record? Calls Football Soccer
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    Default Re: Negative Compression Ratio?

    Ratios less than one (decimal) are for expansion IOW to increase dynamic range.

    Or am I captain obvious?

    Cheers
    Originally Posted by Slipperman
    Deny everything and claim it's all "Haas-Moeller and Graffenfrimitz" MICING techniques and CAN'T be removed from the tracks without damaging the stereo field due to the "Von Stauffenberg Effect".
    Pan Music Productions
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  15. #15
    Frustrated Chick Rock singer...now doing jazz standards poorly! Fletcher's prison bitch
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    Default Re: Negative Compression Ratio?

    The only time I've used negative ratios in a compressor is with a split-band de-esser on the most awful female VO's. BACK OFF THE MIC, BITCH!

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