This is version 2.18 of the AWS Elemental Server documentation. This is the latest version. For prior versions, see the *Previous Versions* section of [AWS Elemental Conductor File and AWS Elemental Server Documentation](https://docs.aws.amazon.com/elemental-server/).

# Output with the Dolby Digital Codec
<a name="dolby-metadata-output-dolby-digital-codec"></a>


| Named Metadata Parameters | Category | Field | API Tag (at stream\_assembly\\audio\_description\\ac3\_settings) | Default | 
| --- | --- | --- | --- | --- | 
| Dialogue Level | D | Dialnorm<br />  | dialnorm | Not set | 
| Channel Mode | D | Coding Mode | coding\_mode | 2/0 | 
| LFE Channel | D | Coding Mode<br />Coding Mode set to “3/2mode with LFE” means LFE is enabled. All other options mean LFE is disabled. |   | Disabled | 
| Bitstream Mode | D | Bitstream Mode | bitstream\_mode | Complete Main | 
| Line Mode Compression | D | No user control |   | Film Std. | 
| RF Mode Compression | D | No user control |   | Film Std. | 
| RF Overmodulation Protection | D | No user control |   |   | 
| Center Downmix Level | D | No user control |   | -3dB | 
| Surround Downmix Level | D | No user control |   | Not indicated | 
| Dolby Surround Mode | D | No user control |   | Disabled | 
| Audio Production Information | D | No user control |   | 0 (does not exist) | 
| Mix Level | D | No user control |   | Not set | 
| Room Type | D | No user control |   | Not set | 
| Copyright Bit | D | No user control |   | 0 | 
| Original Bitstream | D | No user control |   | 0 | 
| Preferred Stereo Downmix | D | No user control |   | Not indicated | 
| Lt/Rt Center Downmix Level | D | No user control |   | -3.0 dB | 
| Lt/Rt Surround Downmix Level | D | No user control |   | -3.0 dB | 
| Lo/Ro Center Downmix Level | D | No user control |   | -3.0 dB | 
| Lo/Ro Surround Downmix Level | D | No user control |   | -3.0 dB | 
| Dolby Surround EX Mode | D | No user control |   | Disabled | 
| A/D Converter Type | D | No user control |   | 0 (standard) | 
| DC Filter | EC | No user control |   | Enabled | 
| LFE Lowpass Filter | EC | When Coding Mode is 3/2, LFE Filter checkbox appears at the far right. | lfe\_filter | Disabled | 
| Surround 3 dB Attenuation | EC | No user control |   | Enabled | 
| Surround Phase Shift | EC | No user control |   | Disabled |