Delete system directory
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export interface CrunkerConstructorOptions {
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/**
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* Sample rate for Crunker's internal audio context.
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*
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* @default 44100
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*/
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sampleRate: number;
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}
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export type CrunkerInputTypes = string | File | Blob;
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/**
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* An exported Crunker audio object.
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*/
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export interface ExportedCrunkerAudio {
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blob: Blob;
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url: string;
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element: HTMLAudioElement;
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}
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/**
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* Crunker is the simple way to merge, concatenate, play, export and download audio files using the Web Audio API.
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*/
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export default class Crunker {
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private readonly _sampleRate;
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private readonly _context;
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/**
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* Creates a new instance of Crunker with the provided options.
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*
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* If `sampleRate` is not defined, it will auto-select an appropriate sample rate
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* for the device being used.
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*/
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constructor({ sampleRate }?: Partial<CrunkerConstructorOptions>);
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/**
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* Creates Crunker's internal AudioContext.
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*
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* @internal
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*/
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private _createContext;
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/**
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*
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* The internal AudioContext used by Crunker.
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*/
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get context(): AudioContext;
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/**
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* Asynchronously fetches multiple audio files and returns an array of AudioBuffers.
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*/
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fetchAudio(...filepaths: CrunkerInputTypes[]): Promise<AudioBuffer[]>;
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/**
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* Merges (layers) multiple AudioBuffers into a single AudioBuffer.
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*
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* **Visual representation:**
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*
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* 
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*/
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mergeAudio(buffers: AudioBuffer[]): AudioBuffer;
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/**
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* Concatenates multiple AudioBuffers into a single AudioBuffer.
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*
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* **Visual representation:**
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*
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* 
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*/
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concatAudio(buffers: AudioBuffer[]): AudioBuffer;
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/**
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* Pads a specified AudioBuffer with silence from a specified start time,
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* for a specified length of time.
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*
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* Accepts float values as well as whole integers.
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*
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* @param buffer AudioBuffer to pad
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* @param padStart Time to start padding (in seconds)
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* @param seconds Duration to pad for (in seconds)
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*/
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padAudio(buffer: AudioBuffer, padStart?: number, seconds?: number): AudioBuffer;
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/**
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* Slices an AudioBuffer from the specified start time to the end time, with optional fade in and out.
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*
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* @param buffer AudioBuffer to slice
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* @param start Start time (in seconds)
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* @param end End time (in seconds)
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* @param fadeIn Fade in duration (in seconds, default is 0)
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* @param fadeOut Fade out duration (in seconds, default is 0)
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*/
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sliceAudio(buffer: AudioBuffer, start: number, end: number, fadeIn?: number, fadeOut?: number): AudioBuffer;
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/**
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* Plays the provided AudioBuffer in an AudioBufferSourceNode.
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*/
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play(buffer: AudioBuffer): AudioBufferSourceNode;
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/**
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* Exports the specified AudioBuffer to a Blob, Object URI and HTMLAudioElement.
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*
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* Note that changing the MIME type does not change the actual file format. The
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* file format will **always** be a WAVE file due to how audio is stored in the
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* browser.
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*
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* @param buffer Buffer to export
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* @param type MIME type (default: `audio/wav`)
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*/
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export(buffer: AudioBuffer, type?: string): ExportedCrunkerAudio;
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/**
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* Downloads the provided Blob.
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*
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* @param blob Blob to download
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* @param filename An optional file name to use for the download (default: `crunker`)
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*/
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download(blob: Blob, filename?: string): HTMLAnchorElement;
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/**
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* Executes a callback if the browser does not support the Web Audio API.
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*
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* Returns the result of the callback, or `undefined` if the Web Audio API is supported.
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*
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* @param callback callback to run if the browser does not support the Web Audio API
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*/
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notSupported<T>(callback: () => T): T | undefined;
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/**
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* Closes Crunker's internal AudioContext.
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*/
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close(): this;
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/**
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* Returns the largest duration of the longest AudioBuffer.
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*
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* @internal
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*/
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private _maxDuration;
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/**
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* Returns the largest number of channels in an array of AudioBuffers.
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*
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* @internal
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*/
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private _maxNumberOfChannels;
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/**
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* Returns the sum of the lengths of an array of AudioBuffers.
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*
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* @internal
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*/
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private _totalLength;
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/**
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* Returns whether the browser supports the Web Audio API.
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*
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* @internal
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*/
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private _isSupported;
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/**
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* Writes the WAV headers for the specified Float32Array.
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*
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* Returns a DataView containing the WAV headers and file content.
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*
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* @internal
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*/
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private _writeHeaders;
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/**
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* Converts a Float32Array to 16-bit PCM.
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*
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* @internal
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*/
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private _floatTo16BitPCM;
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/**
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* Writes a string to a DataView at the specified offset.
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*
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* @internal
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*/
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private _writeString;
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/**
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* Converts an AudioBuffer to a Float32Array.
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*
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* @internal
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*/
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private _interleave;
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/**
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* Creates an HTMLAudioElement whose source is the specified Blob.
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*
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* @internal
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*/
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private _renderAudioElement;
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/**
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* Creates an Object URL for the specified Blob.
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*
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* @internal
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*/
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private _renderURL;
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}
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