As Jude Kelly put it today, the Southbank Centre’s Festival Brazil this summer is about a country "living its future now" (link here for the initial programme).

Tickets go on sale today for this year's Teenage Cancer Trust benefit concerts at the Royal Albert Hall in March. The Who's Roger Daltrey, a patron of the Trust, has been the driving force behind the concerts since they began in 2000. Having failed to find any willing younger rockers willing to take on the job, he has assembled another stellar cast for this year.

Original Cultures is an artistic collective with bases in the UK, Italy and Japan, dedicated to audiovisual collaborations inspired by street art, graffiti, hip hop and electronic music. It is staging its first London event over the course of a week from 27 February to 5 March this year, in which artists Ericailcane, DEM, Will Barras, Hiraki Sawa, Om Unit, Tatsuki and Tayone will be joining to create new works in a series of public events and workshops in and around the Old Truman Brewery, Brick Lane, London.

This week, the great Brazilian songwriter Tom Jobim, in a duet with Elis Regina, as well as teaching jazzer Gerry Mulligan bossa nova and in a version by Ryuichi Sakamoto. It's also the birthday of songwriter Robert Wyatt, and trip-hop pioneer Tricky, who shares a birthday with Mozart.

I’m no folky but I fell for the songs of Kate and Anna McGarrigle the moment I first heard their album Dancer with Bruised Knees, and it’s remained a companion ever since. It never struck me that their songs and the eclectic backing music was "folk", as it was often categorised; the tag presumably arose from Kate’s accordion and banjo playing, their acoustic guitars and, of course, the French-Canadian chansons they sang at home as children - and thankfully introduced to the rest of us.

But regardless of definitions, when Kate sat at the piano and Anna played guitar, or they swapped places and instruments, as far as I was concerned, they were simply fine musicians with strong, distinctive voices, and their songs were personal, quirky, poignant and poetic. Kate’s high, sharp pitches were matched by her unpredictable capacity to burst into shrill open-mouthed laughter onstage and set off Anna and the whole band, and the audience with it. Her quick, droll humour was evident in their between-songs banter, which presumably started when they were children. But singing was a serious business, and rising together, their voices created exquisite, unusual harmonies possible because of those long, close, intuitive connections. Floating above the room, they wove translucent sculptural shapes which swelled into richer, more substantial forms or separated off on different currents before coming together again. It’s unbearably sad to imagine the remaining voice singing alone.

I played Dancer with Bruised Knees over and over, partly for the lyrics which I always assumed had autobiographical undercurrents, but also because of how its songs linked to my own experiences. The title track depicts a dancer feeling safe that her partner would always catch her - until he let her down. Hence the bruised knees. We’ve all been there, and that includes Kate’s experience with her former husband, Loudon Wainwright III. "First Born" - about her son Rufus, surely? - tells of a mother’s silver-spoon treatment of her boy. Its universal appeal is one of the key attractions of her songs. I still find "I Eat Dinner" an almost unbearable description of a solitary life and of eating alone. When she sings “I eat leftovers with mashed potato” she’s almost mocking the curious habits lone diners develop, and with “No more candle-light, romance, small talk… I never thought it would end up this way,” she conjures a bereaved or divorced eater (herself after the Wainwright separation?) - and that single place-setting. Even if you’re locked in coupledom, there’s always a widowed mother or divorced friend waiting to appear before you as you listen.

The McGarrigles’ audiences always had a strong female presence. Over the years, I felt that their lives, as sung about, moved and changed in parallel with my own, and judging by the cheers and laughter, they certainly chimed with many in their audiences. At first, their appeal for me was partly seeing two women playing instruments, singing mostly their own songs, and running the show -  up there and in control. Their interactions were fascinating and unusual: confidently letting private jokes catch in the microphone as they tuned up, little asides about how they looked, and in later years, mocking themselves lightly for their new glam look, the sparkly scarves and glinting ear-rings and that once taboo accessory for us feminists, lipstick. It was a way of unselfconsciously and effortlessly drawing us into the close web they created between themselves; that’s how they transformed every concert hall into a family living room much like the one at home where they sang with their parents as kids, and Kate repeated with her own.

My favourite McGarrigle memory is the concert at the Royal Festival Hall in London, where Kate introduced Martha for the first time (pictured, from left: Martha Wainwright, Joan Baez, Emmylou Harris, Kate McGarrigle, Bruce Cockburn, Anna McGarrigle and Rufus Wainwright). The awkward teenager in a mini-dress shifted around on long skinny legs like a nervous colt, kept moving around her mum for reassurance, and then when she sang, bending and writhing her legs – as she still does in her marvellous performances with her own band – she let go of a voice so mature, it was ready for the world. Her mother listened with eyes shut then she joined her, making their own, quite different harmonies from those with Anna.

Kate McGarrrigle died of sarcoma, a type of cancer, on 18 January, at her home in Montreal. She was 63. Anna sent an email message out to the world that "she departed in a haze of song and love surrounded by family and good friends". They were packed into her room, singing to her as she slowly passed through onto that mysterious journey. Her departure, of course, leaves a terrible space in the songs which Anna will have to reconstitute, but with Martha’s new baby and her own and Rufus’s voices assured and loved, Kate died knowing that the void would be filled in a different, bright and certainly a McGarrigle way.

Official website of the McGarrigles.

Overleaf: watch a clip from a documentary about the McGarrigles