If everthing went well in the Software section, then you should see the following user interfae in the browser:

 Built-In RTTTLs

The screenshot above shows the list of built-in RTTTL sequences.  Play a ditty by clicking on its name in the list.

Playing other RTTTLs

Play other RTTTLs on the-fly!  Click the 'On-the-Fly' link at the top right of the UI.

This brings up a input text box and 'Play' button.

Copy and paste an RTTTL sequence in the textbox, then click the 'Play' button.

An RTTTL sequence is something like:

• PEANUTS:d=4,o=5,b=160:f, 8g, a, 8a, 8g, f, 2g, f, p, f, 8g, a, 1a, 2p, f, 8g, a, 8a, 8g, f, 2g, 2f, 2f, 8g, 1g
  
  

• Austin Powers Theme:d=4,o=5,b=140:a#, 8c#6, 8a#, 8d#6, 8c#6, 8a#, a#, 8a#, 8a#, 8f, g#, 8a#, 8f, g#, 8a#, 8f, g#, 8a#, g#, 8a#, 8a#, 8g#, 8a#, 8c#6, 8d#6, 8c#6, f6, f6, 8g#6, f6, 8g#6, 8a#6, 8a#6, 8a#6, 8g#6, 8f6, 8d#6, 8c#6, 8g#, 8a#, 8f, 8g#, 8f, g#, 8a, a#

The 'Resources' section has a link to more RTTTL selections.