import type { SmallestAITTSModel } from './models.js';
import { TTS } from '../../agents/providers.js';
/** Options for {@link SmallestAITTS}. */
export type SmallestAITTSOptions = {
    /** Smallest AI API key. Defaults to the `SMALLESTAI_API_KEY` environment variable. */
    apiKey?: string;
    /** Voice name for synthesis (e.g. `'magnus'`, `'lauren'`). Takes precedence over `voiceId`. Default `'magnus'`. */
    voice?: string;
    /** Voice id; compatibility alias for `voice`. Ignored when `voice` is also set. */
    voiceId?: string;
    /** TTS model id. Default `'lightning_v3.1'`. */
    model?: SmallestAITTSModel | string;
    /** Output audio sample rate in Hz. Default `24000`. */
    sampleRate?: number;
    /** ISO 639-1 language code for the target voice. Default `'en'`. */
    language?: string;
    /** Speaking rate multiplier; `null` uses the model default. Default `null`. */
    speed?: number | null;
    /** Stream audio from the model. Default `true`. */
    stream?: boolean;
};
declare class SmallestAITTSImpl extends TTS {
    static readonly displayName = "SmallestAITTS";
    _providerName: string;
    apiKey?: string;
    voiceId: string;
    voice: string;
    model: string;
    language: string;
    speed: number | null;
    ttsStream: boolean;
    constructor(opts?: SmallestAITTSOptions);
    getRuntimeConfig(): Record<string, any>;
}
export type SmallestAITTS = SmallestAITTSImpl;
/** Smallest AI text-to-speech (TTS) synthesizer. */
export declare const SmallestAITTS: (opts?: SmallestAITTSOptions) => SmallestAITTS;
export {};