Why is my television talking to me? Something weird has happened to our digital television since my husband retuned it a few weeks ago, following an on-screen message. He carried out the same procedure a year ago, without incident but this time we get a running commentary on most programmes. On the last episode of Coast, after the retune, a woman's voice tells us what is happening, "Nick is now walking along the deck." We can see all of this so we don't need to be told. Why has it suddenly happened? Mrs A D Burrell, by email It is called Audio Description (AD) and it is a free service for blind and partially sighted viewers, available on many digital TVs, set top boxes and DVRs. How it was enabled on your TV is a mystery, and without knowing the make and model of your TV I am unable to tell you how to switch it off but the option can usually be found in the audio settings section of the setup menu. For those who want to know more about AD pop along to the RNIB website at: http://goo.gl/YYm1z.