FR - Mute function for iPhone app wanted :-)

I love the Shake-to-Mute feature for the Apple TV remote, and I would like a similar toggle on/off MUTE functionality somewhere in the iPhone app.
It doesn’t have to be be shake to mute; actually just a MUTE button by the Volume slider within the app would be better. I want to be able to mute commercials without moving the volume slider down and then back up again (takes too long!).