import { TTS } from '../../agents/providers.js';
/** Configuration options for the {@link AzureTTS} provider. */
export type AzureTTSOptions = {
    /** Azure Speech key. Falls back to the `AZURE_SPEECH_KEY` env var. */
    speechKey?: string;
    /** Azure Speech region. Falls back to the `AZURE_REGION` env var, then `'eastus'`. */
    speechRegion?: string;
    /** Neural voice name. Default: `'en-US-JennyNeural'`. */
    voice?: string;
    /** Output audio sample rate in Hz. Default: `24000`. */
    sampleRate?: number;
    [key: string]: any;
};
declare class AzureTTSImpl extends TTS {
    static readonly displayName = "AzureTTS";
    _providerName: string;
    apiKey?: string;
    speechRegion: string;
    voiceId: string;
    voice: string;
    constructor(opts?: AzureTTSOptions);
    getRuntimeConfig(): Record<string, any>;
}
export type AzureTTS = AzureTTSImpl;
/**
 * Azure (Cognitive Services) text-to-speech provider.
 *
 * Creates a configured Azure Speech TTS provider for use in a voice agent.
 */
export declare const AzureTTS: (opts?: AzureTTSOptions) => AzureTTS;
export {};