Beyond The Valley is made up of various live recordings, with all profits going to the Institute for Healing of Memories in South Africa, dedicated to helping victims of apartheid and other violent regimes.
Band members Anne-Marie, Patrick, Michel and Eileen, admit it's not always easy to get together.
"From a practical point of view it's quite difficult. We can't rehearse together on a regular basis," said Anne-Marie.
"It's only once or twice a year in a very concentrated fashion and only when we have concert dates."
Originally hailing from Glasgow, the Byrnes current line-up include Patrick, Michel and Anne-Marie, who grew up together in the city with their French mother, Jeanne, and Scots-Irish father, Sean.
Along with their other siblings, they were brought up bilingual, regularly performing songs from the countries with which they had connections.
"We spoke only French at home, to our parents and each other and we learned English when we went to school," said Anne-Marie.
"It's an interesting way to learn languages, very different to how a lot of other duel nationality families do it."
Although they were well versed in singing at home, the Byrne children were soon thrust into the limelight, performing on stage for the first time while on holiday in Britanny, France, in the 1970s.
"People were getting up and doing a wee turn and they had heard about the singing family from Glasgow so they asked us to get up and do a few songs," said Anne-Marie.
"I was only seven at the time, I don't remember it much, the main protagonists then were Patrick and my sister Bernadette.
"She was about 12 at the time and already had a well formed voice.
"We carried on giving concerts here and there until about 1981.
"When I was 16, that was the last big concert we gave as a big family at Glasgow University."
The now adult Byrnes went their separate ways, with Bernadette joining a convent, Patrick moving to France and Anne-Marie and Michel also moving away from Glasgow.
YEARS passed before Patrick, now 54, Anne-Marie, 47, and Michel, 50, decided to reform.
"We wanted to get back to the music we had done before and try some new stuff," said Annie-Marie. The geography now sees Patrick, linving in Luxembourg, Michel, in Edinburgh, Anne-Marie, in the Lake District and Patrick's daughter Eileen, 27, in Munich.
Eileen is also German through her mother, adding a further element to the group's cultural mix of traditional and contemporary songs sung in French, German, Scots, Scottish and Irish Gaelic and Breton – a Celtic language still spoken in Brittany.
All are accompanied by a plethora of instruments such as the traditional tin whistle, bodhran, djembe drum and guitar and keyboards.
"It's part and parcel of how we've grown up," said Anne-Marie.
"My dad was keen for us to learn Gaelic and now Michel is teaching it in the Celtic Studies department of the University of Glasgow.
"It feels perfectly natural because it was given to us by real people.
"There is always a reason for us to sing in these languages, it's not to show off any sort of prowess."
The international links continue with the causes that benefit from the group's work. They are currently helping with the reconstruction efforts in the Democratic Republic of Congo, said Anne-Marie. "It's good to give to people who need it."
The album is very much a family affair, as it's a tribute to their father, Sean, who passed away two years ago from cancer.
"We were performing at Celtic Connections in Glasgow in 2010 when my dad was taken ill," said Anne-Marie.
"We all got to see him as we were in Glasgow.
"We had to give a concert just days after his funeral, so that was pretty exhausting, most of that concert makes up the bulk of this album. Beyond The Valley is a translation of Runrig track Thairis Air A'Ghleann and we sang that at dad's funeral.
"The recordings are quite emotionally charged.
"We gave a concert in Luxembourg days later, there were a lot of people who had known my dad, so it was emotional on stage and off."
THE album artwork is equally touching, a portrait of Sean with Anne-Marie's then young children, Fiona and Andrew, back in 2002.
"It's just an old family photo blown up but it has a Glasgow fogginess to it, which I like," she said. Music is such an important part of any culture, so we're dedicating this one to his memory."
l The Byrnes, Beyond The Valley, is £10 and available to buy by visiting www.byrnecrossing.co.uk