Example launch line

gst-launch dvdreadsrc title=1 ! mpegpsdemux ! a52dec ! audioresample ! audioconvert ! alsasink

gst-launch filesrc location=abc.ac3 ! a52dec ! audioresample ! audioconvert ! alsasink

struct GstA52Dec

struct GstA52Dec {
  GstElement     element;

  /* pads */
  GstPad        *sinkpad,
                *srcpad;
  GstSegment     segment;

  gboolean       dvdmode;
  gboolean       sent_segment;
  gboolean       discont;

  gboolean       flag_update;
  int            prev_flags;

  int            bit_rate;
  int            sample_rate;
  int            stream_channels;
  int            request_channels;
  int            using_channels;

  sample_t       level;
  sample_t       bias;
  gboolean       dynamic_range_compression;
  sample_t      *samples;
  a52_state_t   *state;

  GstBuffer     *cache;
  GstClockTime   time;

  /* reverse */
  GList         *queued;
};

The "drc" property

  "drc"                      gboolean              : Read / Write

Use Dynamic Range Compression.

Default value: FALSE

The "lfe" property

  "lfe"                      gboolean              : Read / Write

LFE.

Default value: TRUE

The "mode" property

  "mode"                     GstA52DecMode         : Read / Write

Decoding Mode (default 3f2r).

Default value: 3 Front, 2 Rear