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Re: Auto gain [message #86791 is a reply to message #86751] Wed, 15 August 2018 05:24 Go to previous messageGo to previous message
bj is currently offline  bj
Messages: 434
Registered: July 2011
Senior Member
Sorry -- just saw this. I think the manual should say "-7 dB" not "7dB". Also, the -7dB offset does not apply to "MIO" mode.

The auto (makeup) gain is not a dynamic property of the compressor. It is a static property that is computed from the threshold, ratio, and knee (but not from the signal).

For MIO mode, it sets the internal makeup gain such that 0dB in gives 0dB out regardless of the threshold, ratio, and knee. The manual makeup gain is added to automatically computed makeup gain.

For the other modes, it sets the internal makeup gain such that 0dB in gives roughly -7 dB out regardless of the threshold, ratio, and knee; the additional padding is due to the fact that the other modes are not as "grabby" and the output signal is often above the level indicated by the curve. The manual makeup gain is added to automatically computed makeup gain.
 
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