The Brodsky Quartet was formed in 1972, and this recording of Schubert’s String Quintet with the cellist Laura van der Heijden celebrates its 50th year of existence. The Brodskys have vast experience with Schubert’s Quintet, and this shows in their patient, unruffled interpretation of the opening movement, where the composer’s songful melodies are fully savored though never smothered in affection. The slow movement achieves a moving intimacy, the five instruments beautifully reacting to one another. In many other performances, the more truculent accents of the “Scherzo” and final “Allegretto” are gruffly overstated, but here the Brodskys, while incisive, are much subtler and more nuanced. A wonderful, refreshing take on a towering triumph of chamber music.