ltRtSurroundMixLevel
Specify a value for the following Dolby Atmos setting: Left total/Right total surround mix (Lt/Rt surround). MediaConvert uses this value for downmixing. Default value: -3 dB Valid values: -1.5, -3.0, -4.5, -6.0, and -60. The value -60 mutes the channel. Related setting: How the service uses this value depends on the value that you choose for Stereo downmix. Related setting: To have MediaConvert use this value, keep the default value, Custom for the setting Downmix control. Otherwise, the service ignores Left total/Right total surround.