Added comments

Author: chrisn

lib/core.js

@@ -395,6 +395,10 @@ WaveformData.prototype = {
     return waveform;
   },
 
+  /**
+   * Returns the waveform data in binary format as an ArrayBuffer.
+   */
+
   toArrayBuffer: function() {
     if (this._adapter instanceof WaveformDataArrayBufferAdapter) {
       return this._adapter._data.buffer;

waveform-data.d.ts

@@ -201,7 +201,7 @@ declare module 'waveform-data' {
     toJSON: () => JsonWaveformData;
 
     /**
-     * Returns the waveform data as an object
+     * Returns the waveform data in binary format as an ArrayBuffer
      */
 
     toArrayBuffer: () => ArrayBuffer;