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 Dolby Digital Plus (EC2, EAC3) Codec
<a name="dolby-metadata-output-dolby-digital-plus-codec"></a>


| Named Metadata Parameters | Category | Field | API Tag (stream\_assembly\\ audio\_description\\ac3\_settings) | Default | 
| --- | --- | --- | --- | --- | 
| Dialogue Level | D | Dialnorm | dialnorm | Not set | 
| Channel Mode | D | Coding Mode | coding\_mode | 3/2 – L,R,C,LS,Rs | 
| LFE Channel | D | When Coding Mode is 7 or 3/2, the LFE checkbox appears three lines below that checkbox. | lfe | Enabled | 
| Bitstream Mode | D | Bitstream Mode | bitstream\_mode | Complete Main | 
| Line Mode Compression | D | DRC Line Mode Profile | drc\_line  | Film Std. | 
| RF Mode Compression | D | DRC RF Mode Profile | drc\_rf  | Film Std. | 
| RF Overmodulation Protection | D | No user control | - |   | 
| Center Downmix Level | D | No user control | - | -3dB | 
| Surround Downmix Level | D | Stereo Downmix | stereo\_downmix | 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 | - | Note 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 | Lt/Rt Center Mix Level | lt\_rt\_center\_mix\_level | -3.0 dB | 
| Lt/Rt Surround Downmix Level | D | Lt/Rt Surround Mix Level | lt\_rt\_surround\_mix\_level | -3.0 dB | 
| Lo/Ro Center Downmix Level | D | Lo/Ro Center Mix Level | lo\_ro\_center\_mix\_level | -3.0 dB | 
| Lo/Ro Surround Downmix Level | D | Lo/Ro Surround Mix Level | lo\_ro\_surround\_mix\_level | -3.0 dB | 
| Dolby Surround EX Mode | D | Surround EX Mode | surround\_ex\_mode | Disabled | 
| A/D Converter Type | D | No user control |   | 0 (standard) | 
| DC Filter | EC | CD Highpass Filter | dc\_filter | Enabled | 
| LFE Lowpass Filter | EC | LFE Filter | lfe\_filter | Enabled | 
| Surround 3 dB Attenuation | EC | 3 dB Attenuation | attenuate\_3\_db | Disabled | 
| Surround Phase Shift | EC | 90-degree Phase Shift | phase\_shift\_90\_degree | Enabled | 
| Surround Mode | D | When Coding Mode is 2/0, the Surround Mode checkbox appears. | surround\_mode | Not indicated |