/** @packageDocumentation Abstract AudioProperties base class shared by all format-specific audio-properties implementations. */
import { ReadStyle } from "./toolkit/types.js";
/**
 * Abstract base class providing common audio properties such as length,
 * bitrate, sample rate, and channel count.
 */
export declare abstract class AudioProperties {
    /** The read style used when parsing the audio stream. */
    protected _readStyle: ReadStyle;
    /**
     * @param readStyle Controls the trade-off between parsing accuracy and
     *                  performance. Defaults to {@link ReadStyle.Average}.
     */
    constructor(readStyle?: ReadStyle);
    /** Duration rounded to the nearest second. */
    get lengthInSeconds(): number;
    /** Exact duration in milliseconds. */
    abstract get lengthInMilliseconds(): number;
    /**
     * Average bitrate of the audio stream in kb/s.
     * Returns `0` if the value is not available.
     */
    get bitrate(): number;
    /**
     * Sample rate of the audio stream in Hz.
     * Returns `0` if the value is not available.
     */
    get sampleRate(): number;
    /** Number of audio channels (e.g. `1` for mono, `2` for stereo). */
    abstract get channels(): number;
}
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