# Output with the Dolby Digital codec | Named metadata parameters | Category | Field | API tag (at stream\$1assembly\$1audio\$1description\$1ac3\$1settings) | Default | | --- | --- | --- | --- | --- | | Dialogue Level | D | Dialnorm | dialnorm | Not set | | Channel Mode | D | Coding Mode | coding\$1mode | 2/0 | | LFE Channel | D | Coding Mode 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\$1mode | 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\$1filter | Disabled | | Surround 3 dB Attenuation | EC | No user control | | Enabled | | Surround Phase Shift | EC | No user control | | Disabled |