Experiment with the release time and you will notice the difference in the character of the sound. This is the speed at which the compressor stops compressing. With a very fast attack, the audio above the threshold is very rapidly compressed (For example, with a percussive sound such as a snare drum, it'll lose its transient sound). This is the speed at which the compressor must work. If you set the compressor ratio to an infinite number it is called a limiter (Figure 1). Choosing a ratio of 4:1 will reduce this peak with 3 dB. ![]() ![]() Choosing a ratio of 2:1 will reduce a 4 dB peak above the threshold with 2 dB. When the audio signal exceeds the threshold the compressor will start to compress the sound. Almost all audio compressors have the following controls: Threshold
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