export interface AzureTTSOptions {
    key: string;
    region: string;
    voice?: string;
    rate?: string;
    pitch?: string;
    language?: string;
}
export declare class AzureTTS {
    private readonly key;
    private readonly region;
    private readonly voice;
    private readonly rate;
    private readonly pitch;
    private readonly language;
    constructor({ key, region, voice, rate, pitch, language }: AzureTTSOptions);
    synthesize(text: string): Promise<ArrayBuffer>;
}
export interface SSMLOptions {
    voice: string;
    rate: string;
    pitch: string;
    language: string;
}
export declare function buildSSML(text: string, { voice, rate, pitch, language }: SSMLOptions): string;
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