import { type MelMatrix } from './spectrogram.schema.js';
/**
 * A RGBA color, represented as an array of 4 8-bit numbers (0-255) in the order [red, green, blue, alpha].
 */
export type RGBA = [number, number, number, number];
/**
 * A spectrogram is a visual representation of the spectrum of frequencies of a signal as it varies with time.
 * This class represents a spectrogram as a 2D array of 8-bit numbers received from the API.
 * It can be converted to a canvas or PNG buffer, or saved to disk.
 * It is not altered or processed in any way, it is simply an interpretation of the raw data so you can do with it as you please.
 */
export declare class Spectrogram {
    /**
     * @param data The spectrogram data in its raw form. A 2D array of 8-bit numbers.
     */
    constructor(data: MelMatrix);
    /**
     * The spectrogram data in its raw form. A 2D array of 8-bit numbers.
     */
    readonly data: MelMatrix;
    /**
     * Get the width of the spectrogram output.
     */
    get width(): number;
    /**
     * Get the height of the spectrogram output.
     */
    get height(): number;
    get rgba(): RGBA[][];
}