Born on October 7, 1964, she came to it as naturally as breathing because she grew up in the most musical of families. Just before The Beatles broke through, her father, Joe, was an influential guitarist and had three Top 10 pop hits. Her mother Vicki was a top backing vocalist from the early 70s onwards, with her partner Liza Strike famously providing the harmonies for T. Rex. What with Joe owning a nearby studio too (The Grange), Sam's childhood home was always full of musicians, among them Small Faces' Steve Marriott and Pink Floyd's Dave Gilmour.

Amid the hullabaloo, she reckons she was "quite a solitary person" but that didn't deflect her destiny: "I'd be in my room listening to Elkie Brooks or Rickie Lee Jones and knitting or writing my diary, or playing the piano". Lyrics fascinated her. No cliches, no love, were her self-imposed rules. At 14 she put words and a tune of her own together for the first time. "It was called Window People," she recalls... "I wrote it in 7/8 and played it to my dad and he said "Yeah, it'd be all right if you put it in proper time". It did make a B-side later, but what I did naturally was not commercial in any way whatsoever."

With no career plans in mind, just swimming with the tide of her background and talent, she appeared as vocalist with the National Youth Jazz Orchestra and in 1977 her "first musical pay-day" sang back-ups on the Small Faces' final album In The Shade (later, with her mother, she sang back-ups for Marriott's Packet Of Three as The Lillettes).

By the time she was 17, though, she felt the need for independence and moved to London. "I didn't want my family to have anything to do with my music then," she says. "When I did my first demos, although we had a studio at home, I found one in Yellow Pages and paid for it with my own money that I'd made from singing on sessions. These were simply piano/vocal demos."

Still, the music world always brought her new friends. Sometime Pretenders guitarist Robbie McIntosh and Paul McCartney band keyboardist Wix were among those who helped her with a later, full band demo. Much varied writing and demoing led to her signing with a major label, A&M, and her brief experience of full-on fame: "What that made me realise was that I grew up with music, not the music business. The business was a big shock to my system."

Her self-reliance fully established, to record her debut album she turned back towards her family, asking the label to try her guitarist brother Pete as producer, even though she had "never really got on with him". It worked. Slowly. In 1989, almost a year after release, following Top 10 showings in Holland and Germany, the single Stop began to get saturation radio play in the UK. It reached Number 4; the album did likewise and went on to sell 2.5 million world-wide despite a variety of sounds, which set it beyond any fashion of the day: "There are songs with strings on, jazz, out-and-out Dixieland, dance tunes.

Although promotion over such a long haul," says Sam, "completely did my nut, buying a couple of houses and other perks were nice." However, she was about to hit an unwontedly steep commercial decline. Despite more chart singles, the follow-up April Moon (1990) dipped to something over half a million sales and, preposterously, sales of her third album 43 Minutes (1993) also plummeted. A promising career ruined in three easy stages? "I did that incredibly well," she laughs.

While her unfashionably passionate style had something to do with it, there was also the matter of a grievous disruption in her life, which affected her priorities and her music. Just after Sam had produced a solo album for her mother, Vicki Brown became very ill with cancer. "My aunt, a close family friend and I nursed her through it," says Sam. "My mum died in June 1991. While she was ill I started writing 43 Minutes and the main lesson I learnt was a record's no use to anybody unless you believe in what you're doing. All I want to do is sit down and write songs at the piano, not think about copying Stop and having hits, which everyone wanted me to do at the time.

"43 Minutes is the first album that really represents me. It's not directly about my mother's death, but it is a whole piece and very fierce. Pete produced it and I basically said, "Don't change anything, this is how it is. It really homed in on what I thought, what death chucks up at you. So many people go through that experience and you're not supposed to talk about it. Well, how the fuck are you supposed to deal with it if you can't talk about it?"

A&M asked her to add a hit single, she refused and so it went out on her own hastily created label Pod. "We gigged it for ages and that was great too, one of the best things I've done," she says. "I played it solo in churches sometimes. It would really move people, I suppose because I meant it."

She's carried on meaning it through another strong independent release, Box (1997, on Demon), which pleasingly picked up to 17,000-odd sales - boosted, no doubt, by that promotional trip to gun-toting Chelyabinsk - plus sessions, and a lot of gigs as featured vocalist with the Jools Holland Rhythm & Blues Orchestra and backing singer on Pink Floyd's Division Bell tour in 1994.

That's not to mention the birth of her children, Vicki in September, 1993, and Mohan in June, 1995. Her husband is Robin Evans, a producer who started out on early Manic Street Preachers and spent summer 2000 in the studio with Dodgy. And, since the early 90s, Sam Brown and family have lived in a tiny Scottish village. As ever, the house is invariably full of musicians.