/**
 * https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-synthesis-markup-voice#:~:text=Optional-,pitch,-Indicates%20the%20baseline
 */
export declare enum PITCH {
    X_LOW = "x-low",
    LOW = "low",
    MEDIUM = "medium",
    HIGH = "high",
    X_HIGH = "x-high",
    DEFAULT = "default"
}