When you first open Pd you get the “console window”. It looks something like this:
This is not a Pd program, its just where messages will be printed to. Also, notice the check box in the top right that says DSP. Pd will only produce sound when this box is checked! So go ahead and check it. Also remember you can uncheck it if you need to make the sound stop!
Its also worth noting Pd will only produce sound if you have working speakers or headphones and Pd is set up to use them. To check the audio settings go to Media > Audio Settings. Here you can make sure Pd is using the input and output device you want to use.
Create a Patch
To create a new patch select File > New. This will give you a blank window, this is the patch canvas where you do your patching.
Go to the Put menu and add an object. This gives you an empty box which will follow your cursor around. Once you click it is placed and you can type a name or value to define what kind of object you want. This is a good time to try the other options in the Put menu, go ahead…
One thing to know about the Pd and the mm library is that there are help files. To learn about a particular object, right (control) click on an object and select help.
For a more detailed Pd overview I recommend Floss Manuals overview here.