2.1.27. Look-ahead

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The look-ahead parameter controls how much of the active loudness window Loudness Leveler uses for predictive leveling. This control is expressed as a percentage of the current window rather than as an explicit millisecond budget.

Larger values give the leveler more time to react before a loudness change reaches the output. For the standard timing modes, this percentage determines the real look-ahead delay. For the low-latency timing modes, the configured percentage is used as a stochastic prediction horizon to simulate the effect of a look-ahead buffer without adding delay.

In low-latency timing modes, look-ahead is implemented through predictive look-ahead. Setting look-ahead mode to OFF disables both the real look-ahead buffer and the low-latency predictive mode.