An Audio Compressor is used to compress the dynamic range of sound. Dynamic range compression is used in recorded music to reduces the difference between the loudest an softest sound.
With a compressor you can:
- Prevent distortion
- Maintain dynamic range
- Raise the loudness of the recording
With dynamic range compression you set parameters to control how the sound is effected.
The can have the following parameters:
Here is a brief explanation of each parameter:
- This is the volume level the compressor begins to affect the signal.
- This is the amount of compression applied to the signal.
- How fast the compressor starts affect the signal once the signal is over the threshold.
- How long it the compressor stays on after the signal has fallen below the threshold.
- Adjust the make up volume after the signal is affected by the compressor.
Two more terms with compression are:
- Soft Knee Compression
- Hard Knee Compression
Hard knee applies compression at an even rate.
Soft knee applies compression at a varying rate.
They have three or four frequency bands that let you apply different compression to different frequencies.
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