I just found today a classical music radio station that broadcasts in my geographic area. I listened to classical music 35 years ago while working full time and going to school part time; it helped me cope with stress. But it turns out you can stream just about anything over the Internet with just a browser.

One link I can provide is: Background Noises • Ambient Sounds • Relaxing Music | myNoise (R)

This doesn't offer music but rather various sounds, such as nature, indoor ambiance, and tones to stimulate certain brain wave patterns.

Highly recommended!