Hey, contrary to other apps, the apk files as well as the source code to SplashPlay (http://splashplay.co.uk/) are fully available (as part of the OpenIntents distribution), so you may try it out
yourself:http://code.google.com/p/openintents/downloads/list

We stated clearly in the readme that bluetooth connectivity was simulated (mocked up), but implemented the back-end on the phone: Run the application, press play: You see that the chord display is in sync with the tune. It is not hard to imagine that the same chord changing commands could be sent to a hardware device via bluetooth.

We had a couple of usability gimmicks that will make practising really convenient: * The A/B repeat button lets you specify a loop region. * Click any chord to jump to that position. * Click and drag over a couple of chords to mark a loop region that starts playing automatically.

All of this is no mock-up, but fully functional. (and open source :-) )

Please try it out. We look forward for any feedback, as we will try to bring the software backend to SplashPlay to the next level in round 2 :-)

Pelihttp://code.google.com/p/openintents/http://www.openintents.org/en/