Problem changing Audio Midi sample rate

I have just downloaded my first few high resolution files from HDTracks (which will be the topic for another post). To use highres music with iTunes you must have a D/A converter that will support higher than 16/44.1 CD quality music. To adjust the sample rate for iTunes, you must go into the Audio Midi application found under the aplications/utilities folder and use the combo box for the sample rate. While a sighted member of my family can easily make this change, this combo box doesn't work with VoiceOver. Has anyone found a way to change the sample rate combo box without sighted help? BTW, I am fortunate to have a very good stereo system and the 24/96 files sound materially better than the 16/44.1 files ripped in lossless AIFF format.