The ability to stream music from your iPhone directly to speakers or an AirPlay-enabled device like the Apple TV is one of the perks of iOS. Some music apps, like Pandora, include a handy AirPlay button that makes turning on streaming simple. So how do you get other music playing applications on the iPhone to use AirPlay?
Just because the app developer didn't include the AirPlay button directly in the app interface doesn't mean you're out of business. Apple has included a default AirPlay switch in iOS along with volume controls on the multitasking dock. Accessing AirPlay from any music app is possible as long as your AirPlay-compatible devices are properly configured on your Wi-Fi network.