They sounded like any band in a Dublin rehearsal room. But there was something quite extraordinary about the five-piece outfit heard running through their set in a city centre rehearsal space this week.
Their lead singer is Oscar-nominated actor Michael Fassbender – star of movie Shame – and his backing band included rising Irish movie talent Domhnall Gleeson and Carla Azar, Jack's White percussionist, on drums.
However, this band were not rehearsing for a gig in Whelan's, but a starring role in director Lenny Abrahamson's new Irish movie Frank.
"Fingers crossed, my keyboards make it to the soundtrack and I don't get replaced in the mix. They might just be saying to me 'you sound great' before they get a real keyboard player in to replace me," Domhnall Gleeson told The Diary.
Co-star Michael Fassbender could be more confident about his vocals and guitar, having once fronted a heavy metal band in his hometown of Killarney as a teenager.
The Irish Film Board will be hoping they can play in tune after investing half-a-million euro in Frank, which begins shooting next month in New Mexico.
A tale inspired by left-field music figures, including Manchester odd-ball Frank Sidebottom, it follows the adventures of an avant-garde band led by a mysterious front-man, played by Fassbender.
Insiders on the film haven't ruled out Fassbender's outfit testing their musical chops by playing an impromptu gig.
"It might just be what they need but having Michael Fassbender will get them some attention pretty quick," said a movie insider.
Expect composer Stephen Rennicks to be in the audience – the Abrahamson collaborator composed the band's songs.
Meanwhile, Domhnall Gleeson can be seen with his dad Brendan Gleeson and brother Brian in Immatürity For Charity, a one-off sketch show also featuring Amy Huberman and Love/Hate star Robert Sheehan, which airs on RTÉ Two, Thursday, December 27 at 9.30pm to raise funds for St Francis Hospice, Raheny.