2.1.7. Source range

The source range parameter allows you to specify a min and max loudness value for the source signal. Loudness values within the source range are mapped onto the target range to determine the amount of gain reduction or amplification. The resulting target is then followed by the optimizer using the configured attack/release and/or linear attack/release parameter settings.

The source range is adjusted using percentile + offset parameters. This allows you to set the source range to span a particular percentile of the input loudness distribution. The offset parameter allows you to adjust the source range up or down in loudness. Both of these parameters are controlled in units of percentiles.

The LRA preset can be used to match the range used by the LRA algorithm.