Yes, the channels on Dish are owned by
Muzak (see
http://www.muzak.com/ )
Their channels are designed to "create a mood" without interrupting the listeners. Or as they put it:
Music. Some people call it our passion. Others, our obsession. Inspired by the art of Audio Architecture, Muzak gives you more than just music. We create an experience - a powerful, persuasive experience that captures the image, energy and soul of your business. With a broad selection of core music programs designed specifically for business applications, Muzak can create the right experience for your brand.
This as opposed to Sirius and orther radio services, where people are expected to listen to the content and not just the mood. A "Muzak mood channel" doesn't distract from what is going on at the business like a radio station can.
BTW: Muzak has a complete description of the E* channels as well as their commercial offerings on their website.