The look-ahead parameter allows you to configure how far in advance the compressor looks for the source signal. This can be used to align the compressor’s response to account for the loudness window time and/or attack/release times, or simply as a creative effect.
Look-ahead requires that the look-ahead budget parameter is configured via the settings tab. This method of look-ahead configuration is used to support real-time adjustments of look-ahead without causing stuttering which would otherwise interfere with A/B testing.
Note that look-ahead budget adds latency to the compressor in order to function.