[1] With a new bardic harp with bronze strings, Stivell began experimenting with modernized styles of music that became known as Celtic rock.

In 1968, after two years of touring and regular appearances at the American Students and Artists Center in Paris, Alan joined the Moody Blues onstage to perform in London's Queen Elizabeth Hall.

He became closely associated with the burgeoning Breton roots revival, especially after the release of the purely instrumental 1971 album Renaissance of the Celtic Harp, which won one of the most famous awards in France, the prize of the Académie Charles Cros.

The music critic Bruce Elder wrote of the album Renaissance of the Celtic Harp: People who hear this record are never the same again.

To call this music gorgeous and ravishing would be the height of understatement—indeed, there aren't words in the English language to describe this record adequately.

(Debussy wrote one of his finest works, "The Engulfed Cathedral," later adapted by the group Renaissance into "At the Harbour" on the 1973 album Ashes Are Burning, based on the same legend).

The reflective "Marv Pontkellec" is every bit as sublimely beautiful, but the highlight of this record is "Gaeltacht," a 19-minute musical journey by Stivell's harp across the Gaelic lands of Ireland, Scotland, and the Isle of Man.

He continued working with a variety of musicians, inviting Paddy Moloney (of The Chieftains), Jim Kerr (of Simple Minds), Khaled and Youssou N'Dour to be in his very international 1 Douar / 1 Earth album.

[3] The 1998 French-language hit "La Tribu de Dana" by rap trio Manau, one of the best-selling French singles of all time, featured a very similar musical arrangement to Stivell's "Tri Martolod".

Although Stivell sued Manau for the unauthorised sampling, the group claimed that they had modified the original sufficiently, through the addition of lyrics and other changes, to avoid any charges of plagiarism.

The album explored fusions of Celtic music with electro-rock, raga and hip-hop with a unique and personal vocal style and an original mix of lyrics in Breton, English and French.

[citation needed] On 2 October 2015, Stivell released a new CD album called AMzer: Seasons through WorldVillage in France (and other countries), his first one of the 2010s, coinciding with his career's 50th anniversary.

"[1] An English translation of Stivell's interview for Le Peuple Breton by Peter Barry was published in the Scottish political, current affairs and arts review, Calgacus in 1975.

[10] In the 1978 book Racines interdites ("Forbidden Roots"), a series of interviews with Stivell covers questions about the Breton language, history and geography, as well as his utopian vision of a world living in meditative harmony with nature.