more-on-pd.md

@@ -12,7 +12,7 @@ Program in the following notes to the **message** boxes like we did before. We n
 from left to right:   
 **57 62 64 66 67 71**   
 
-Now we can use the buttons to play the melody:
+Now we can use the buttons to play the melody:   
 1 2 3 4 4    
 4 3 4 2 2    
 2 3 4 5 6    
@@ -21,3 +21,19 @@ Now we can use the buttons to play the melody:
 6 1 5 4 2     
 2  3  4   5    
 3   3  4  2     
+
+Playing this melody is pretty hard. And it already sound good when we use the **qlist** to play it. 
+
+Let's add some chords to this song instead.
+======
+There are some new objects in the patch that deal with chords. Let's look at **pd chord_D** first. We can use this object to play a D chord which is the first chord in this song. You will notice that **pd chord_D** has two inlets. The first inlet tell it how loud to make the chord. The second inlet tell it which notes to play. This is similar to the inlet of **pd boop** but we tell it multiple notes to play since we want to hear a chord. 
+
+We need to tell **pd chord_D** which notes to play. To do this we need to make a new **message** object. You can do this either by pressing **control-2** on your keyboard or using the "put" menu and choosing "Message". Place the **message** object on top of the second inlet of **pd chord_D**.  Now we need to tell it what message to send. Rather than putting in a single number like we have so far. We are going to put in a list of numbers. Put the numbers **62 66 69** into the **message**.   Now connect the outlet of the **message** to the second inlet of **pd chord_D**. 
+
+We also need to tell **pd chord_G** and **pd chord_A** what notes we want to hear. Make a **message** for each of these objects and connect them as we did before. But for **pd chord_G** make the numbers **62 67 71**.  And for **pd chord_A** make the numbers **61 64 67 69**. Notice that **pd chord_A** is special, it can play a chord with four notes, but **pd chord_D** and **pd chord_G** can only play three-note chords. 
+
+Now we need some way of controlling these chords. We don't want them to play all the time, and we already used up our buttons. 
+
+Let's use the potentiometers instead!
+======
+