[sublimeloge]

I expect the article doesn't mention them because it views them as a means to an end. Since the article is about high-level philosophical concerns and not the nuts and bolts of how the music is created, talking about compositional/performance tools such as computers and synthesizers would be out of place -- the article is more concerned with the aesthetic goals which these or other tools would be used toward rather than the tools themselves.

Anyway the article does actually mention electronics at least twice, althouh both times mostly in passing:

"I draw your attention to the example we heard yesterday, when Nathan Davies used live filtering to give the effect of resonators, extracting tones from white noise, and turning those tones towards music."

"Joanna Bailie, to take just one example, has used the recorded and digitally processed sounds ..."