Live Microphone: BT Speaker is an application that allows you to use your Android phone as a microphone. Live Microphone: BT Speaker is a must-have tool for every Android user who needs to make an audio recording or to use the phone as a speaker. It allows you to record your voice, or to use it as a microphone for recording a live audio stream.

You can make use of this if you don't have a wire to connect a mic to your speaker. The app also supports a variety of sound formats for mobile phones.