Worked great at our wedding!

We used this app and some powered speakers as a PA system for our wedding ceremony, and for toasts afterward. It worked great with the phone taped to a trellis beam a few feet above our heads, people were amazed! We tested it earlier and found it works best with mic volume and speaker volume at 75%. Standing far from the speakers is important too - we used a 20 headphone extension cable from RadioShack.

dennnnyt about VonBruno Microphone Pro, v1.2