Just curious. Could you also use Bluetooth speakers? Would anything coming out of the controller kb interfere with the speakers or would the speakers just ignore anything except audio? Also, is there any such thing as a standalone bluetooth receiver/audio converter that can turn regular powered speakers into bluetooth speakers?
chas
Bluetooth speakers, now, that's where there is latency. Of course, playing backup music through Blutooth speakers is no issue as latency is irrelevant.
Bluetooth MIDI transmitter: Quicco Sound Mi1, Yamaha, and another one by a Chinese company, and I don't know how the quality is http://www.ebay.com/itm/232312936095?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Bluetooth MIDI receiver; WIDI Bud by CME Audio. It works very well. Probably the only Bluetooth MIDI receiver in the world. The Korg Microkey doesn't need a Bluetooth MIDI receiver for Windows setup. Your Windows built in Bluetooth receiver will pair with the Microkey Air through a free app by Korg. Mind you that the stylish looking, but over-priced CME Xkey Air Bluetooth MIDI keyboard does not come with a Windows driver. It needs the WIDI Bud. Besides, the Korg is a lot more playable than the CME.
Bluetooth audio receiver: You got the right idea. Yes, there are 14 thousands of them. You can find them on Amazon.com.