type RecorderStatus = 'idle' | 'recording' | 'processing';
type OnPcmDataAvailable = (pcmData: Float32Array) => void;
interface UseVoiceRecorderReturn {
    isRecording: boolean;
    status: RecorderStatus;
    duration: number;
    error: string | null;
    startRecord: (onPcmData?: OnPcmDataAvailable) => Promise<void>;
    stopRecord: () => Promise<ArrayBuffer | null>;
    cancelRecord: () => void;
}
/**
 * Convert raw PCM Float32Array to a WAV ArrayBuffer.
 */
declare function convertPcmToWav(pcmData: Float32Array, sampleRate?: number, channels?: number): ArrayBuffer;
/**
 * Convert WebM/Opus blob to 16kHz mono WAV ArrayBuffer
 * via AudioContext decode + OfflineAudioContext resample.
 */
declare function convertWebmToWav(webmBlob: Blob): Promise<ArrayBuffer>;
declare function useVoiceRecorder(): UseVoiceRecorderReturn;

export { OnPcmDataAvailable, RecorderStatus, UseVoiceRecorderReturn, convertPcmToWav, convertWebmToWav, useVoiceRecorder };