

With it she brought a new voice to the plight of those who are poor and discriminated against - and a deep, expressive voice at that. That first album, a collection of socially conscious folk-rock songs, featured the singles ''Fast Car'' and ''Talkin' Bout a Revolution'' and took pop-music by storm when it sold millions of copies worldwide and helped the unknown artist win three Grammy awards. They may also be surprised to discover that ''New Beginning'' (Elektra) is her fourth to date, right behind 1992's ''Matters of the Heart,'' 1989's ''Crossroads,'' and her wildly successful self-titled debut from 1988. ALTHOUGH the recent Beatles blitz is making it hard to get past the ''B'' section in record stores these days, listeners who do may be surprised to find that singer-songwriter Tracy Chapman has quietly released a new album.
