/**
 * Required when you set (Codec) under (AudioDescriptions)>(CodecSettings) to the value AC3.
 */
export interface _Ac3Settings {
    /**
     * Specify the average bitrate in bits per second. Valid bitrates depend on the coding mode.
     */
    Bitrate?: number;
    /**
     * Specify the bitstream mode for the AC-3 stream that the encoder emits. For more information about the AC3 bitstream mode, see ATSC A/52-2012 (Annex E).
     */
    BitstreamMode?: "COMPLETE_MAIN" | "COMMENTARY" | "DIALOGUE" | "EMERGENCY" | "HEARING_IMPAIRED" | "MUSIC_AND_EFFECTS" | "VISUALLY_IMPAIRED" | "VOICE_OVER" | string;
    /**
     * Dolby Digital coding mode. Determines number of channels.
     */
    CodingMode?: "CODING_MODE_1_0" | "CODING_MODE_1_1" | "CODING_MODE_2_0" | "CODING_MODE_3_2_LFE" | string;
    /**
     * Sets the dialnorm for the output. If blank and input audio is Dolby Digital, dialnorm will be passed through.
     */
    Dialnorm?: number;
    /**
     * If set to FILM_STANDARD, adds dynamic range compression signaling to the output bitstream as defined in the Dolby Digital specification.
     */
    DynamicRangeCompressionProfile?: "FILM_STANDARD" | "NONE" | string;
    /**
     * Applies a 120Hz lowpass filter to the LFE channel prior to encoding. Only valid with 3_2_LFE coding mode.
     */
    LfeFilter?: "ENABLED" | "DISABLED" | string;
    /**
     * When set to FOLLOW_INPUT, encoder metadata will be sourced from the DD, DD+, or DolbyE decoder that supplied this audio data. If audio was not supplied from one of these streams, then the static metadata settings will be used.
     */
    MetadataControl?: "FOLLOW_INPUT" | "USE_CONFIGURED" | string;
    /**
     * This value is always 48000. It represents the sample rate in Hz.
     */
    SampleRate?: number;
}
export declare type _UnmarshalledAc3Settings = _Ac3Settings;