I don't think anybody should be distracted by earphones while in the saddle.
That said, I always have some music on when I'm building up bikes. These days I mostly listen to stuff like this:
http://khmermusic.thecoleranch.com/R...s_Paen_Ron.wma
http://khmermusic.thecoleranch.com/Gompenge.mp3
Believe it or not Cambodia churned out good garage/pop in the '60s!