Schumann and Schubert: Piano Quintets. The Atlantis Ensemble . Musica Omnia , $ 13 . 99 . The performance sounds like infectious fun breaking out among friends playing the most delightful pieces of 19th-century chamber music. The ensemble plays an original 1835 Graf piano and suitably matched string instruments. As a bonus, Max van Egmond sings the song Die Forelle (The Trout), which became a set of variations within Schubert’s quintet. Haydn: Piano Trios (complete). Van Swieten Trio.

Brilliant Classics , 10 - CD set , $ 46 . 98 . Fortepianist Bart van Oort, two violinists, two cellists and a flautist present Joseph Haydn’s sparkling trios. This music is not as well known as his quartets, symphonies or sonatas, but it deserves to be heard. The set is arranged in a nearly chronological sequence, and it is fun to hear the change in compositional style as the cello part becomes increasingly independent from the pianist’s left hand. Arvo P rt: Triodion.

Nine compositions from 1996 to 2002. Poly phony , conducted by Stephen Layton . Hyperion , $ 21 . 98 . P rt’s distinctive style seems more relaxed than usual. Most of these compositions on Christian themes and texts are for unaccompanied chorus. One of the texts is an unlikely choice the recited genealogy in Luke chapter 3. Polyphony is a 26-member chamber choir. Countertenor David James is the soloist in the haunting setting of My Heart’s in the Highlands, by Robert Burns.

Leonard Pennario: The Early Years, 1950-1958. Piano music by Chopin , Schumann , Liszt , Franck , Mussorgsky , Prokofiev , Bartok , Rozsa , Ravel , Debussy and Pennario . MSR Classics , 4 - CD set , $ 19 . 99 . Pennario was among the most elegant of 20th-century American pianists, and he has put together this five-hour set documenting his early career at Capitol Records. Everything here has the perfect blend of fire and easy flow.