Thanks again for looking at the logs. The Elecard is a red-herring, as I installed that to see if it would get things working - it didn't, and it wasn't working before I installed it.
*However* - I can watch recordings if I uncheck the "Use Built In Transport Stream Reader for TS files" box in the Misc tab; but this doesn't help with the timeshifting, which is still without audio.
I attach some more logs (with Elecard removed) just in case it may be of any help.