is-audio-buffer/index.js

Check whether an object is instance of AudioBuffer

/**
 * @module  is-audio-buffer
 */

'use strict';

module.exports = function isAudioBuffer (buffer) {
	//the guess is duck-typing
	return buffer != null
	&& typeof buffer.length === 'number'
	&& typeof buffer.sampleRate === 'number' //swims like AudioBuffer
	&& typeof buffer.getChannelData === 'function' //quacks like AudioBuffer
	// && buffer.copyToChannel
	// && buffer.copyFromChannel
	&& typeof buffer.duration === 'number'
};