Connected Digital AV Adapter to HDMI HD TV. Photo slideshow works fine but cannot play iTunes playlist concurrently (with sound turned off on slideshow)

Question

Connected Digital AV Adapter from my iPad (64 GB 4G) to my HD TV. Tried playing slideshow (with sound off) concurrently with playing iTunes playlist. Video plays fine but no audio. iTunes volume indicator not showing any volume.

Answer 1

Just following-up on this posting from a week or two ago and another a few days later about the problems with catch-up TV.  We were disappointed with the lack of service, but as we can get most of the catch-up we want on the Sony Bravia TV, hadn't pursued it with BT perhaps hoping things would improve.
Got a phone call last week from BT asking if we'd been able to set up the YouView Box OK, which we had.  Mentioned the unsatisfactory service.  She immediately put me through to the BT technical call centre in India where I spoke to guy called Rajiv or something like that.  Asked a few questions and then asked me to switch off the YouView Box (back panel switch) and do a hard-reset on the Homehub Router.  Once this had been done, and the YouView box switched back on.  The service ran fine and has done so since.  I don't know if Rajiv did anything in the network or whether this is just some problem (he called it a "glitch") in the router/YouView box.  Funny that that the speedtest and streaming to the Sony TV works OK.
He phoned back a couple of days later to see if we'd had any further problems.  Overall good service.  It would be interesting to know from a technical point of view what the problem was and how it was solved.  It shouldn't be necessary to reset boxes in this way.