| Op. 16 | Sonata for Flute and Cello (1962, rev. 1975) for Flute and Cello |
| Op. 18 | Sonata No. 1 for Violin and Piano (1963, rev. 2004) for Violin and Piano |
| Op. 19 | String Quartet No. 2 (1963, rev. 1993) for String Quartet |
| Op. 26 | Woodwind Quintet (1964, rev. 1998) for Woodwind Quintet |
| Op. 31 | Fantasia quasi una Toccata (1965, rev. 1982) for Brass Octet and Four Percussionists |
| Op. 32 | String Quartet No. 3 (1965, rev. 1992) for String Quartet |
| Op. 35 | Piano Quintet No. 1 (1967) for Piano and String Quartet |
| Op. 38 | Canzona sopra un tema di Monteverdi (1968) for Brass Nonet and Viola |
| Op. 39 | Concertino (1968, rev. 1988) for Harp, Harpsichord, Celesta, and Piano |
| Op. 41 | Sonata No. 1 for Cello and Piano (1968, rev. 1977) for Cello and Piano |
| Op. 46 | Christmas Frescoes (1969, rev. 1996) for Piano and Five Percussionists |
| Op. 47 | String Sextet: Nun komm’ der Heiden Heiland (1970, rev. 1997) for String Sextet (Two Violins, Two Violas, Two Cellos) |
| Op. 54 | Sonata for Oboe and Piano (1972) for Oboe and Piano |
| Op. 54a | Sonata No. 2 for Violin and Piano (1972) for Violin and Piano |
| Op. 56 | String Quartet No. 4 (1972) for String Quartet |
| Op. 63 | Canzona Secundi Toni (1975) for Brass Choir (Three Trumpets, Three Horns, Three Trombones, and Tuba) |
| Op. 66 | String Quartet No. 5 (1977) for String Quartet |
| Op. 70 | Brass Quintet (1978) for Brass Quintet |
| Op. 71 | Sonata for Horn and Piano (1979) for Horn and Piano |
| Op. 75 | Consort Music (1980) for Five Violas da Gamba |
| Op. 76 | Prelude and Fugue (1980) for Six Percussionists |
| Op. 86 | Besos sin cuento (1989) for Alto, Flute, Viola, and Harp |
| Op. 89 | Sonata No. 2 for Cello and Piano, “La Divina Commedia” (1990) for Cello and Piano |
| Op. 93a | Gematria Prologue (1991/2001) for Trumpet and Organ |
| Op. 94 | A Duet for Violas (1991) for Two Violas |
| Op. 94a | A Duet for Cellos (1991) for Two Cellos |
| Op. 103 | Piano Quintet No. 2 (1995) for Piano and String Quartet |
| Op. 106 | Sonata for Trombone and Piano (1996) for Trombone and Piano |
| Op. 110 | Serpentine (1999) for Clarinet and Piano |
| Op. 115 | Clausulae for Trombones (2001) for Three Trombones |
| Op. 116 | Strictly Personals (2001) for Soprano, Baritone, and String Quartet (or Piano) |
| Op. 118 | String Quartet No. 6 (2004) for String Quartet |
| Op. 121 | Sonata for Bassoon and Piano (2006) for Bassoon and Piano |
| Op. 124 | Minyan (2013) for Viola and Guitar |