A compressor is an effects processor that compresses the dynamic range of various signals passing through the compressor. It is mainly used to soften loud sounds and make soft sounds louder. The main task of the compressor is to reduce the amplitude of the loud portion of the signal. This process is called gain reduction. As the amplitude of the loud signal decreases, a small amount of amplification is used to increase the low level signal. Together, these operations narrow the dynamic range of the signal.
The following are some of the commonly used parameters of the compressor:
Threshold control is used to set the amplitude level at which the compressor begins to act. The compressor starts to function when the input level is above the threshold.
Ratio control is used to determine the input level to the output level. For example, a 4:1 ratio would be 1 dB per input into the compressor above the threshold setting. In fact, this control is the amount of pressure limit of the compressor, that is, the gain reduction.
3. Attack time
The attack time setting is used to control the time from when the input signal reaches the threshold level to when the compressor begins to attenuate the signal. In other words, the amount of time from the time the signal exceeds the threshold to the time the compressor begins to act.
4. Release time
The release time is used to control the amount of time the compressor keeps the signal at the threshold level after the input signal falls below the threshold level. In other words, the amount of time the compressor remains for the signal below the threshold level.
5. Output gain
The output gain is used to adjust the output level of the compressed signal. With the output gain, you can make better settings for all output levels of the compressor.
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