Is it possible to get sound out a pi using Bluetooth? I assume (if it can) it will need to be a USB dongle? Well there be a lag? I'm not looking at playing the audio to Bluetooth during the show. I am thinking about, when I record a video, putting a small Bluetooth speaker next to the camera to record the sound, This will assist with lining up the footage. Only reason I am going with Bluetooth as I have a few small speakers I can use. I can look at an FM transmitter option, but wanted to see if this option is possible.