The technology behind digital radio is Digital Audio Broadcasting (DAB). This is the format adopted by government and broadcasters in Britain and many other European countries.

It was adopted to eliminate interference, optimise the use of the radio spectrum and provide a wider choice of stations.

DAB also enables stations to broadcast on exactly the same frequency throughout the UK.

How does it work

Separate signals from a group of different stations and services are bundled together and transmitted as a single data stream, This is called a 'multiplex' or 'ensemble'. In the UK there will be 7 multiplexes within VHF band III of the radio spectrum.

Why is digital radio better.

It makes better use of the radio spectrum, allowing more stations and more choice. It gives clear sound with no hiss, crackle or other interference.

As well as speech and music, digital radio can also transmit text and data. For instance, you can see the name of the artist, the title of the track, or even keep up with the football scores while listening to a rugby match commentary.

The key benefits

More choice

20 National stations

More than 300 local stations (typically between 18 and 38 depending on your location)

24 new digital-only stations

Superb sound quality

No hiss or crackle

No need to retune on the move

Easy to use

Text information

Free - no subscription charges