What is Compression Ratio?

Compression Ratio is a parameter in dynamic range compression that determines how much the signal is reduced once it exceeds the threshold. It is known for controlling the intensity of compression.

The ratio is typically expressed as a comparison, such as 2:1, 4:1, or 10:1, indicating how much input level above the threshold is reduced in the output. For example, at a 4:1 ratio, every 4 dB above the threshold becomes 1 dB at the output.

Compression Ratio emphasizes control over dynamics, allowing engineers to tame peaks, smooth levels, or create more consistent audio.

Lower ratios result in subtle compression, while higher ratios produce more aggressive limiting and control.

Today, Compression Ratio is a fundamental setting in audio production, valued for its role in shaping dynamics, controlling peaks, and achieving a polished, balanced sound.