If You're sleepless in Seattle, turn your radio dial to 98.1 FM for KING FM Seattle. Seattle's classical and opera channel.
I'm not at all saying it will put you to sleep. Well, it may, but take it from me. When I have classical music playing I rarely fall asleep to it. I want to hear it all the way through. But then again, it depends on what is playing.
Or if you're alone in San Antone: KPAC - 88.3 FM
If you can suggest other classical stations in your part of the globe, please post them below.