> For someone who wants to follow along and try your code, is there a simple way to hear it?

If you install the latest muO (or download the muo286 image provided at 
http://www.zogotounga.net/comp/squeak/sqgeo.htm) then the code from the 
paper appears as a test case in

MuODocumentationTest>>#testPurdieVariation

You can copy/paste it in a workspace and work with it.

To hear the eventual phrase, do "phrase play". The default synthesizer 
is the first MIDI out port listed by your system (on Windows it is the 
Microsoft MIDI mapper), so you should get some sound.

If for some reason the default MIDI port does not work you can choose 
another one via the "muO objects" menu (yellow click in the World) from 
the "+synthesizers" -> "default synthesizer" -> "MIDI out port" submenu.

You can also use a Squeak synthesizer:

(SqueakSynthesizer new instrument: FMSound clarinet)
   playPhrase: phrase softer fermata

but here I have had to reduce both notes length and amplitudes in order 
to get a clear sound, hence the "softer fermata" part.


Stef