is-midi

Check if a Buffer/Uint8Array is a MIDI file

Install

$ npm install is-midi

Usage

Node.js

const readChunk = require('read-chunk'); // npm install read-chunk
const isMidi = require('is-midi');
const buffer = readChunk.sync('song.mid', 0, 4);
 
isMidi(buffer);
//=> true

Browser

const xhr = new XMLHttpRequest();
xhr.open('GET', 'song.mid');
xhr.responseType = 'arraybuffer';
 
xhr.onload = () => {
    isMidi(new Uint8Array(this.response));
    //=> true
};
 
xhr.send();

API

isMidi(buffer)

Accepts a Buffer (Node.js) or Uint8Array.

It only needs the first 4 bytes.

Related

• file-type - Detect the file type of a Buffer/Uint8Array

License

MIT © Chris Vogt