ready to attempt sample rate stuff

extras/wav2sketch/wav2sketch.html

     <h1>Teensy Audio Wav2Sketch Utility</h1>
     <p>Upload an audio file to convert it into Teensy audio format.</p>
     <form>
-      <input id="audioFileChooser" name="audioFileChooser" type="file" accept="audio/*" multiple>
+      <label>Sample rate</label>
+      <select>
+        <option>Auto</option>
+        <option>44100</option>
+        <option>22050</option>
+        <option>11025</option>
+      </select><br/><br/>
+      <input id="audioFileChooser" name="audioFileChooser" type="file" accept="audio/wav" multiple>
       <div id="outputFileHolder"></div>
     </form>
     <script type="text/javascript" src="wav2sketch.js"></script>

extras/wav2sketch/wav2sketch.js

 }
 
 function processFile(file, fileName) {
-  var context = new OfflineAudioContext(1,10*44100,44100);
+  var context = new OfflineAudioContext(1,100*44100,44100); // 100 seconds for now
 	context.decodeAudioData(file, function(buffer) {
+    console.log(buffer.sampleRate);
   	var monoData = [];
     if(buffer.numberOfChannels == 1) {
       monoData = buffer.getChannelData(0);