import WaveSurfer from "wavesurfer.js";
export declare const timelineWaveSurferPlaybackSystem: {
    add: ((item: WaveSurfer, initData?: {
        startFrame: number;
    } | undefined) => false | import("@lincode/promiselikes").Cancellable) | ((item: WaveSurfer, initData?: {
        startFrame: number;
    } | undefined) => boolean);
    delete: ((item: WaveSurfer) => false | import("@lincode/promiselikes").Cancellable | undefined) | ((item: WaveSurfer) => boolean);
};