London, May 12 (IANS) Are you a die-hard fan of Irish rock band U2? Stay hooked as a study of 150 music videos made by U2 fans has revealed their emotions that can be used to help them find new songs online.

The study uncovered a range of methods, both visual and musical, used to convey emotion, through location, style of music and video content, said the team from University of Strathclyde, a Scottish public research university located in Glasgow.

"Although music holds no emotion in itself, it can elicit very deep emotions in listeners and performers," said Dr Diane Pennington, lecturer in the university's department of computer and information sciences.

The videos were covers of U2's "Song For Someone" from their 2014 album "Songs Of Innocence".

They were made and posted on video streaming website YouTube after the band invited their fans to create their own clips, which would "make (it) your song."

The research found that the videos, and viewers' responses to them, were highly individual but often also social, with shared emotions creating a sense of community.

It also found that such emotions could help to inform searches, recommendations and playlists in online music providers.

"The emotion music evokes is the main reason people listen to it and many would like to be able to search for music videos that meet an emotional need, such as a desire to be cheered up," Dr Pennington added.

"I chose the 'Song For Someone' clips as a case study after U2 called for fans to make them," the author noted.

"This was because it would be a rich source of information and because, for their fans, U2's songs and concerts are highly emotional; this is reflected in the content of the Song For Someone clips and the reactions they produced," the study said.

Many of the cover versions were personalised by people recording their own versions in their houses or bedrooms, or including images of their loved ones.

"Others signified their devotion to U2 by using their original version to accompany the clip or by including U2 paraphernalia such as t-shirts, posters and photos," Dr Pennington noted.

The research could inform commercial music service providers on how they might include emotional factors in their recommendations and automatically created playlists.

"Allowing retrieval system users to search, browse and retrieve by positive emotions could also have a contribution to make to music therapy," said the study published in the Journal of Documentation.