The threshold of a compressor is that threshold
, at which point the compressor begins to compress the signal. It is given in decibels (dB) or in dynamics (RMS) and indicates how loud or dynamic the signal must be for the compressor to become active.
If the signal is below the threshold, the compressor remains inactive
and the signal is passed on unchanged. However, as soon as the signal exceeds the threshold, the compressor begins to compress the signal and reduce the dynamic range of the signal. This means that the loud parts of the signal are reduced and the quiet parts are increased to dynamic Range
to decrease overall. The threshold can be adjusted in different ways depending on the type of compressor used. Some compressors allow the threshold to be adjusted manually, while others use an automatic threshold based on the average loudness of the signal. The threshold is an important factor affecting the performance and impact of a compressor.