/**
 * The voice file formats.
 */
export declare enum ChatVoiceFormat {
    /**
     * The PCM format.
     */
    PCM = "pcm",
    /**
     * The AMR format.
     */
    AMR = "amr",
    /**
     * The MP3 format.
     */
    MP3 = "mp3"
}
/**
 * The voice parameter class, which describes the format information of a voice file.
 *
 * It is used only as the input parameter of {@link ChatManager.voiceFileToText}.
 */
export declare class ChatVoiceParam {
    /**
     * The format of the voice file. See {@link ChatVoiceFormat}.
     */
    format: ChatVoiceFormat;
    /**
     * The sample rate of the voice file, in Hz.
     */
    sampleRate?: number;
    /**
     * The number of bits per sample of the voice file.
     */
    bitsPerSample?: number;
    /**
     * The number of channels of the voice file.
     */
    channels?: number;
    constructor(params: {
        format: ChatVoiceFormat;
        sampleRate?: number;
        bitsPerSample?: number;
        channels?: number;
    });
}
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