Monday, July 09, 2007

Neat Vista Trick: Listening to Radio 5 commentary whilst watching TV (BBC2 Tennis)

One thing that happens quite often in the UK is that sporting events and some concerts are covered simultaneously by TV and Radio.

This has led to quit a common scenario where people will mute their tv and watch the pictures whilst listening to the radio commentary however there is an issue with this since digital tv came in.

Basically DVB-T TV signals require a finite amount of time to process so the image is delayed slightly in appearing. Of course this means that Radio and TV are out of sync which is very annoying at sporting events where you can see what has happened before the commentary catches up.

With media center the obvious thing would be to listen to the freeview DVB-T radio 5 source whilst watching the images from another tuner but unfortunately Media Center doesn't let you do that.

This all came to light for me when the friend I recently built the Media Center for,asked me if she could watch the Wimbledon Tennis coverage whilst listening to the BBC Radio 5 commentary.

At first I couldn't see a solution but then it struck me that Radio 5 has an internet stream on the BBC website and I wondered if she could make use of that.

Well she tried that and yes she could play the internet stream at the same time as watching tv but the stream was now slighly delayed over the tv image. She came up with a brilliant work round for this - Pause the tv until the sound was in sync.

Having got that worked out we still had the issue that she was getting both the radio audio from the web stream and the tv audio from media center.

Now Vista's new sound architecture came to the rescue. Opening the sound mixer in Vista shows independant volume controls for each program playing sound. In this case it was simply a matter of muting the Media Center sound source and hey presto Radio Five commentary on the BBC TV Tennis coverage.