/**
 * Neural Voice Adapters for HoloScript+
 *
 * Provides unified interfaces for high-fidelity neural text-to-speech.
 * Supports streaming audio for low-latency spatial dialogue.
 */
export interface VoiceOptions {
    voiceId: string;
    stability?: number;
    similarityBoost?: number;
    style?: number;
    useSpeakerBoost?: boolean;
}
export interface VoiceProvider {
    /**
     * Synthesize text to an audio stream or buffer
     */
    synthesize(text: string, options: VoiceOptions): Promise<ArrayBuffer>;
}
/**
 * ElevenLabs Neural Voice Adapter
 */
export declare class ElevenLabsAdapter implements VoiceProvider {
    private apiKey;
    private baseUrl;
    constructor(apiKey: string);
    synthesize(text: string, options: VoiceOptions): Promise<ArrayBuffer>;
}
/**
 * Azure Neural Voice Adapter
 */
export declare class AzureVoiceAdapter implements VoiceProvider {
    private subscriptionKey;
    private region;
    constructor(subscriptionKey: string, region: string);
    synthesize(text: string, options: VoiceOptions): Promise<ArrayBuffer>;
}
/**
 * Voice Manager to select and manage providers
 */
export declare class VoiceManager {
    private providers;
    private defaultProvider;
    registerProvider(name: string, provider: VoiceProvider, setAsDefault?: boolean): void;
    speak(text: string, providerName?: string, options?: VoiceOptions): Promise<ArrayBuffer>;
}
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