import { STT } from '../../agents/providers.js';
import type { CartesiaSTTModel } from './models.js';
/**
 * Configuration options for the {@link CartesiaSTT} provider.
 *
 * Additional fields are read from the options object via the index signature:
 * `inputSampleRate` (default `48000`), `outputSampleRate` (default `16000`),
 * `encoding` (default `'pcm_s16le'`), `cartesiaVersion` (default `'2026-03-01'`),
 * `minVolume` (default `null`), `maxSilenceDurationSecs` (default `null`),
 * and `baseUrl` (default `null`).
 */
export type CartesiaSTTOptions = {
    /** Cartesia API key. Falls back to the `CARTESIA_API_KEY` env var, then `null`. */
    apiKey?: string | null;
    /** Transcription model. Default: `'ink-whisper'`. */
    model?: CartesiaSTTModel | string;
    /** Transcription language code. Default: `'en'`. */
    language?: string;
    /** Audio sample rate in Hz. Default: `48000`. */
    sampleRate?: number;
    [key: string]: any;
};
declare class CartesiaSTTImpl extends STT {
    static readonly displayName = "CartesiaSTT";
    _providerName: string;
    apiKey: string | null;
    model: string;
    language: string;
    sampleRate: number;
    inputSampleRate: number;
    outputSampleRate: number;
    encoding: string;
    cartesiaVersion: string;
    minVolume: number | null;
    maxSilenceDurationSecs: number | null;
    baseUrl: string | null;
    constructor(opts?: CartesiaSTTOptions);
    getRuntimeConfig(): Record<string, any>;
}
export type CartesiaSTT = CartesiaSTTImpl;
/**
 * Cartesia speech-to-text provider.
 *
 * Creates a configured Cartesia STT provider for use in a voice agent.
 */
export declare const CartesiaSTT: (opts?: CartesiaSTTOptions) => CartesiaSTT;
export {};