That would be a very cool feature as long as we are allowed to access that protocol through iOS. We are extremely limited as a third party as to what we can do with the audio stream and media on the device (no processing or DRM media for example). However, Apple has changed their rules throughout the years so this may be possible in iOS 8 without invoking the iTunes API. Keep in mind that we cannot use the build in iTunes (Music app) functions because this does not allow us to process the audio with DPS.
Thanks for the suggestion!