/**
 * Deepgram streaming STT provider. Default STT for `PipelineVoiceProvider`.
 *
 * Connects to `wss://api.deepgram.com/v1/listen` with WS subprotocol
 * `Token <api_key>`. Emits final + interim transcripts plus VAD
 * `speech_started` / `UtteranceEnd` events for barge-in handling.
 *
 * Pricing: per audio second. Rates registered under provider `deepgram`.
 */
import type { SttProvider, SttSession, SttSessionOptions } from './voice-stt.js';
export interface DeepgramSttProviderOptions {
    apiKey: string;
    /** Default model. `nova-3` is the v1.12 default (best latency/accuracy). */
    model?: string;
    /** Override base URL. */
    baseUrl?: string;
    /** Provider name override. Default `deepgram`. */
    name?: string;
}
export declare class DeepgramSttProvider implements SttProvider {
    readonly name: string;
    private readonly apiKey;
    private readonly defaultModel;
    private readonly baseUrl;
    constructor(options: DeepgramSttProviderOptions);
    open(opts?: SttSessionOptions): Promise<SttSession>;
}
//# sourceMappingURL=voice-stt-deepgram.d.ts.map