export type VoiceProvider = "browser" | "elevenlabs";
export interface VoiceConfig {
    provider: VoiceProvider;
    voice?: string;
    rate?: number;
    pitch?: number;
    volume?: number;
    lang?: string;
}
export interface ElevenLabsVoiceConfig extends VoiceConfig {
    provider: "elevenlabs";
    voice: string;
    model?: "eleven_multilingual_v2" | "eleven_monolingual_v1";
    stability?: number;
    similarity_boost?: number;
}
export interface BrowserVoiceConfig extends VoiceConfig {
    provider: "browser";
    voice?: string;
    rate?: number;
    pitch?: number;
    volume?: number;
}
export declare class ElevenLabsTTSProvider {
    private apiKey;
    private baseUrl;
    constructor(apiKey: string, baseUrl?: string);
    synthesize(text: string, config: ElevenLabsVoiceConfig): Promise<Blob>;
    getVoices(): Promise<any[]>;
}
export declare class BrowserTTSProvider {
    synthesize(text: string, config: BrowserVoiceConfig): Promise<SpeechSynthesisUtterance>;
    getVoices(): SpeechSynthesisVoice[];
}
export declare function createVoiceProvider(config: VoiceConfig, apiKey?: string): ElevenLabsTTSProvider | BrowserTTSProvider;
export declare const LOCALE_VOICE_MAPPING: Record<string, VoiceConfig>;
export declare const DEFAULT_VOICE_CONFIGS: Record<string, VoiceConfig>;
/**
 * Get voice configuration based on locale
 * @param locale - The locale code (e.g., 'en', 'de', 'es')
 * @returns Voice configuration for the locale, falls back to English if not found
 */
export declare function getVoiceForLocale(locale: string): VoiceConfig;
/**
 * Get available locales for voice selection
 * @returns Array of available locale codes
 */
export declare function getAvailableLocales(): string[];