A compressor is basically a variable gain device, where the amount of gain used depends on the level of the input. In this case, the gain will be reduced when the signal level is high which makes louder passages softer, reducing the dynamic range. This effect equals dynamic volume regulator.
Thres Hold: Certain level for threshold, in db. Varies from -92 to 0.
Rate: Rate of mixing signals, in percent. Varies from 1 (minimal effect) to 100 (maximal effect).
RMS Time: Time for root-mean-square calculation, in ms. Usually RMSTime is equal to 100 ms.
How to use
-Left-click-and-drag on the select a portion of the audio
-Click Effects menu and select Compressor
Tip:
1. N db = 20 lg (Pn/P0)
N - number of db.
Pn - Level of sound pressure in pascals.
P0 = 2*105 pascals.
2. A compressor is basically a variable gain device, where the amount of gain used depends on the level of the input. In this case, the gain will be reduced when the signal level is high which makes louder passages softer, reducing the dynamic range. This effect equals dynamic volume regulator.
3. This behavior is opposite to that of the Expander.