World DJ Fund 2003 has entered into a partnership with the music recognition company Shazam to raise £3,000 for Nordoff-Robbins Music Therapy, which caters for people with physical handicaps or behavioural problems.
Shazam works when users dial a special number from their mobile phone and point the phone towards the source of the unidentified music. Thirty seconds later they receive a text message with the name of the song and the artist.
On 25 April all charges for the service, which is nick-named "tagging", will be donated to World DJ Fund. Radio 1 Breakfast Show host Sara Cox has already issued a challenge to find the "serial tagger" who raises the most money.
"We thought that this was another good way of involving music in the fundraising," said Paul Simpson, spokesman at World DJ Fund.
The initiative is part of the charity's fundraising week, which starts on Saturday. Last year, it raised £300,000.