Looking for a Public Address System or Microphone or Microphone app to integrate the following hardware configuration:1- microphone (internal or USB external) 2- iPad 3- Logitech Wireless Speaker Adapter 4- powered speakers. The goal is to create a Public Address system with an Pad 2 and then iPhone. I just purchased a Logitech Wireless (Bluetooth) Speaker Adapter. It works great, pairing immediately, and driving a pair of old powered speakers playing from Music app. I would like to drive the speakers from the internal or external USB Logitech microphone. I tried using several microphone apps. One worked with the Bluetooth speakers but only from recorded voice. The other worked in real time but only through the audio jack not Bluetooth speakers.