/**
 * https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-synthesis-markup-voice#:~:text=Optional-,rate,-Indicates%20the%20speaking
 */
export declare enum RATE {
    X_SLOW = "x-slow",
    SLOW = "slow",
    MEDIUM = "medium",
    FAST = "fast",
    X_FAST = "x-fast",
    DEFAULT = "default"
}