import { TTS } from '../../agents/providers.js';
/** Configuration options for the Inworld AI text-to-speech (TTS) provider. */
export type InworldAITTSOptions = {
    /**
     * Inworld AI API key. Falls back to the `INWORLDAI_API_KEY` environment
     * variable when omitted.
     */
    apiKey?: string;
    /** Voice used for synthesis. Defaults to `'Hades'`. */
    voiceId?: string;
    /** TTS model identifier. Defaults to `'inworld-tts-1'`. */
    modelId?: string;
    /** Output audio sample rate in Hz. Defaults to `24000`. */
    sampleRate?: number;
};
declare class InworldAITTSImpl extends TTS {
    _providerName: string;
    apiKey?: string;
    voiceId: string;
    voice: string;
    model: string;
    constructor(opts?: InworldAITTSOptions);
    getRuntimeConfig(): Record<string, any>;
}
/** Instance type returned by the {@link InworldAITTS} factory. */
export type InworldAITTS = InworldAITTSImpl;
/** Inworld AI text-to-speech (TTS) provider. */
export declare const InworldAITTS: (opts?: InworldAITTSOptions) => InworldAITTS;
export {};