What can I do to resolve intermittent connection lapses while listening to music via my Airport Express?

"You could try using a wireless stumbler, such as KisMAC, that shows the signal strengths and channels of any wireless signal it can receive. This will let you figure out the best channel to set to. Keep in mind that channels overlap, so 1, 6 and 11 are the three big ones to aim for (these particular channels do not overlap). If you can't find a good channel (this will only work if you have a newer base station) you could also try switching the band to 5GHz. There will be less range, but there are few devices on this band.

Another thing you could try is repositioning your router. Try attaching an extension cord (or the replacement extension duck connector that comes with Mac laptops. I don't know if the Express comes with one) and repositioning it away from sources of interference."

"I had a similar problem, but with an iTunes update in the past few months, the problem seems to have disappeared.

If an update doesn't help, then set itunes to play through multiple speakers, (including the computer it's playing from) that may solve the problem. You can mute the volume on your computer if you don't want tinny sound adding itself to the music coming through your sound system."