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The difference between the quietest and the loudest sounds in an audio signal, measured in decibels (dB).

The level above which compression is applied to the audio signal.

The proportion by which the input signal above the threshold is reduced; expressed as a ratio (e.g., 4:1).

The time it takes for the compressor to start acting after the signal exceeds the threshold.

The time it takes for the compressor to stop reducing the signal level once it falls below the threshold.

The gain applied after compression to bring the level of the signal back up after it has been reduced.

The curvature of the transition from uncompressed to compressed signal which can be hard or soft.

The amount by which the signal is reduced in volume by the compressor.

An audio device or software that reduces the dynamic range of a signal.

A type of compressor with a very high ratio, essentially allowing no overshoot beyond the threshold. Often used to prevent peak overloads.

An alternate signal path that can trigger the compressor, rather than the main input signal. Used in creative effects like 'ducking'.

Short, high-energy peaks in an audio signal, often in need of control by compression.

The process of increasing the dynamic range of a signal by reducing the volume of signals below a certain threshold.

A technique where the original signal is mixed with a compressed version of itself to maintain dynamic range while controlling peaks.

A more advanced form of compression that applies different settings to various frequency bands independently.

Unwanted effects introduced by aggressive or incorrect use of a compressor, such as 'pumping' or 'breathing'.

A combination of a compressor and an equalizer that applies compression to specific frequency ranges.

A noticeable fluctuation in volume that can occur with heavy compression, particularly with low-frequency sounds.

An extreme form of limiting with an infinite or very high ratio, ensuring that no signal exceeds the output ceiling.