No sound on ATV2 suddenly

Hi

running Frodo RC1 for the past few days. Everything working well...but today suddenly no sound. The atv2 has sound natively .ie youtube or connecting to itunes
but via xbmc nothing. Worked yesterday and I have not manually changed anything. This behaviour is in both confluence and transparency skins

The problem extends as far as the gui sounds in the skin itself as well as media


My audio settings are hdmi - 2 channel with all other options off

first time posting a log - hope I did it right!



OS Build 4.2.1 8c154
Software 4.1.1


regular log
http://pastebin.com/tjDWd2gQ

debug log
http://pastebin.com/MxRVwyFc


just something to note - if a run xbmc "normally" - I get no sound - but the video plays. Running in debugging mode it crashes back to ios

thanks for any and all help