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Compression Ratio
From WikiRecording
(Redirected from Ratio)
The Compression Ratio is the ratio of change between input level and output level once the threshold is reached. For example, a ratio of 4:1 means that an input level increase of 4 dB would only result in an output level increase of 1 dB.
Example
If you take the -20 dB threshold and take your input signal that reached -12 dB with no compressoin (8 dB above the threshold), if you compress it at 4:1 (8 / 4 = 2) the signal would only reach -18 dB (-20 + 2 = -18).
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