Fill in audio module tutorial

modules/audio.md

@@ -5,27 +5,38 @@
 
 ## <img class="constrain-sm" src="https://s3.amazonaws.com/technicalmachine-assets/technical-io/modules/usb.png"> Audio
 
-[<i class="fa fa-github"> View source on Github</i>](https://github.com/tcr/node-audiovideo)
+[<i class="fa fa-github">View source on Github</i>](https://github.com/tessel/tessel-av)
 
 ### Step 1
 
 Make a directory inside your "tessel-code" folder called "audio", change directory into that folder, and initialize a tessel project:
 
 `mkdir audio; cd audio; t2 init`
 
+Download [this mp3](https://dl.dropboxusercontent.com/u/3531958/yoda-mudhole.mp3) into the "audio" directory: 
+
+`wget https://dl.dropboxusercontent.com/u/3531958/yoda-mudhole.mp3`
+
+Create a file called ".tesselinclude" with the mp3 file name in it: 
+
+```
+touch .tesselinclude;
+echo "yoda-mudhole.mp3" > .tesselinclude
+```
+
 ### Step 2
 </div>
 </div>
 
 <div class="row">
 <div class="large-6 columns">
 
-Plug Tessel into your computer via USB, then plug the audio module into either of Tessel's USB ports.
+Plug Tessel into your computer via USB, then plug the audio module into either of Tessel's USB ports. You will also need some kind of speaker output, headphones or [desk speakers](http://www.amazon.com/AmazonBasics-Powered-Computer-Speakers-A100/dp/B00GHY5F3K/) will do the trick.
 
 </div>
 <div class="large-6 columns">
 
-![](http://i.imgur.com/uifn1p7.jpg)
+![](http://i.imgur.com/zbRKAVx.jpg)
 
 </div>
 </div>
@@ -35,7 +46,7 @@ Plug Tessel into your computer via USB, then plug the audio module into either o
 
 ### Step 3
 
-Install by typing `npm install audiovideo` into the command line.
+Install by typing `npm install tessel-av` into the command line.
 
 ### Step 4
 
@@ -46,10 +57,21 @@ Rename "index.js" to "audio.js" and replace the file's contents with the followi
 // http://creativecommons.org/publicdomain/zero/1.0/
 
 /*********************************************
-DESC of EXAMPLE
+- Play audio from an amusing scene between Luke Skywalker, R2-D2 and Yoda
+- When the audio reaches the end, play it again from the beginning. 
 *********************************************/
 
-// EXAMPLE GOES HERE
+var path = require('path');
+var av = require('tessel-av');
+var mp3 = path.join(__dirname, 'yoda-mudhole.mp3');
+var sound = new av.Speaker(mp3);
+
+sound.play();
+
+sound.on('end', function(seconds) {
+  sound.play();
+});
+
 
 {% endhighlight %}
 
@@ -71,16 +93,15 @@ Save the file.
 
 In your command line, `t2 run audio.js`
 
-Hooray! You should see WHATEVER YOU SHOULD SEE FROM THE EXAMPLE
+Hooray! You should hear the mp3 playing in a loop!
 
 **Bonus:** EXTRA CHALLENGE FOR AUDIO
 
-To see what else you can do with the USB audio module, read the [audiovideo](https://github.com/tcr/node-audiovideo) documentation.
+To see what else you can do with the USB audio module, read the [tessel-av](https://github.com/tessel/tessel-av) documentation.
 
 </div>
 <div class="large-6 columns">
 
-![](AUDIO OUTPUT GIF)
 
 </div>
 </div>
@@ -90,7 +111,10 @@ To see what else you can do with the USB audio module, read the [audiovideo](htt
 
 ### Step 6
 
-What else can you do with an audio module? Get inspired by a [community-created project.](http://tessel.io/projects)
+What else can you do with an audio module? 
+
+- Try connecting buttons to your Tessel 2 and use them to control playback. 
+- Load many mp3s onto a USB storage drive and playback from that source. 
 
 What are you making? [Share your invention!](//tessel.io/projects)