Lauryn Hill and Wyclef Jean have turned a telephone number into an artwork. The two musicians, who make up the Fugees, have launched FUGEES HOPELINE, a participatory sound project created with the British public art platform CIRCA to mark thirty years since the group released its defining album, The Score. Anyone can ring +1 (424) 7-FUGEES to hear personal messages from Hill and Jean, along with an exclusive first listen to a new Fugees medley narrated by Hill's daughter, singer and model Selah Marley.

The project takes its cue from Dial-A-Poem, the late avant-garde artist John Giorno's experiment of the late 1960s, which let callers dial in to hear recorded poetry. Here the invitation runs in both directions: as well as listening, callers can record their own voices, experiences and reflections on hope, with contributions accepted through 31 December. The number is also being displayed on large public screens, including the Piccadilly Lights in London and a screen at L.A. Live in Los Angeles, throughout November.

The recordings will have a physical afterlife at Art Basel Miami Beach. Selected contributions are due to be presented at Faena Forum on 4 and 5 December, as part of an exhibition curated by Hill with the cultural agency Saint and Citizen, alongside artwork and set design from the group's current tour. CIRCA has commissioned the project as the latest in a six-year run of artist collaborations shown on the Piccadilly Circus screen, a series that has previously featured Ai Weiwei and Frank Bowling.

Hill has also made three original collages celebrating the Fugees' history, published by CIRCA as limited-edition prints. Large hand-signed editions of 500 are priced at 1,000 pounds each, or 2,500 pounds for the set, while smaller stamp-signed editions cost 200 pounds each and remain on sale until the end of the year. The medley heard on the line is billed as the group's first new official release since Take It Easy in 2005, with a December release planned.