AC-3 Decoder Options

Dynamic Range Scale Factor. The factor to apply to dynamic range values from the AC-3 stream. This factor is applied exponentially. There are 3 notable scale factor ranges:

'drc_scale == 0'

DRC disabled. Produces full range audio.

'0 < drc_scale <= 1'

DRC enabled. Applies a fraction of the stream DRC value. Audio reproduction is between full range and full compression.

'drc_scale > 1'

DRC enabled. Applies drc_scale asymmetrically. Loud sounds are fully compressed. Soft sounds are enhanced.