| Op. 1158 | Moon Marked (2016) for Clarinet and Trumpet |
| Op. 700 | Moon Shards (2007) for Alto Saxophone, Horn, Trumpet, Percussion, Piano |
| Op. 968 | Morning at Brant Point (2012) for Viola and Cello |
| Op. 179 | Netherlands Travelogue (1999) for Trumpet (young performers) and Piano |
| Op. 787 | Newton Antiphonies (2008) for Two or More Trumpets |
| Op. 735 | Oboe Quartet (2007) for Oboe and String Trio |
| Op. 867 | October Serenade (2010) for Soprano Saxophone and Guitar |
| Op. 246 | Of Ice and Silver Swans (2001) for Horn and Piano |
| Op. 384 | Of Songs and Swirls: Four Lyric Pieces (2002) for Soprano Saxophone and Piano |
| Op. 914 | OQP’s Chronometer (2011) for Any Solo or Combination of Instruments |
| Op. 92 | Paradoxes: Sonata for Cello and Piano (1998) for Cello and Piano |
| Op. 1283 | Peace Canticle (2018) for Solo Treble Instrument and Organ |
| Op. 206 | Pentecost Compline (2000) for Bass Recorder and Organ |
| Op. 626 | Polpis Dreaming (2005) for Contrabassoon and Piano |
| Op. 410 | Polpis Dreaming (2002) for Contrabass Saxophone and Piano |
| Op. 388 | Pooh’s Serenade (2002) for Bassoon, Cello, Piano |
| Op. 1011 | Prayer of St. Ambrose (2003) for Alto Saxophone and Organ |
| Op. 495 | Prayer of St. Ambrose (2003) for Flugelhorn and Organ (or Flugelhorn and String Orchestra) |
| Op. 239 | Prayers (2001) for Guitar and Organ |
| Op. 903 | Prelude Modale (2011) for Two Horns and Organ |
| Op. 256 | Prophesies (2001) for Trumpet and Organ |
| Op. 855 | Quartet for Piano and Strings (A Sea Liturgy) (2009) for Piano Quartet |
| Op. 998 | Quidnet Morning Loop (2013) for Any Combination of Instruments |
| Op. 849 | Quidnet Shadows (2009) for Flugelhorn and Harp |
| Op. 920 | Quiet Hocket (2011) for Horn and Harp |
| Op. 764 | Quintet for Bassoon and Strings (2005-08) for Bassoon and String Quartet |
| Op. 175 | Quintet for Trumpet and Strings (1999) for Trumpet and String Quartet |
| Op. 1541 | Radiant Revolutions (2024) for Organ, Brass Quintet, and Timpani |
| Op. 1525 | Reflection on “Wondrous Love” (2023) for Euphonium and Organ |
| Op. 612 | Road of Light (2005) for Saxophone Quartet |
| Op. 1065 | Rochester Triptych (2014) for String Quintet |
| Op. 461 | Sankaty Dreaming (String Quartet No. 4) (2002) for String Quartet |
| Op. 1344 | Scherzetto (2019) for Flute and Organ |
| Op. 732 | Schumann Serenade (2007) for String Trio |
| Op. 360 | Sedet ad Dexterem Dei Patris (2002) for Violin and Organ |
| Op. 999 | Shadowbook (Three Songs in the Night) (2013) for Clarinet, Tuba, Piano |
| Op. 685 | Shining Space: Quintet for Horn and Strings (2006) for Horn and String Quartet |
| Op. 459 | Showings of Divine Love (2002) for Viola (Baroque and Modern) and Organ |
| Op. 385 | Silent Prisms (2002) for Tenor Saxophone and Piano |
| Op. 589 | Solar Visions (2004) for Woodwind Quintet |
| Op. 1013 | Solstice Sonata (2013) for Trumpet and Organ |
| Op. 151 | Sonata for Brass Choir (1999) for Brass Choir (3 Trumpets [1 C/2 Bb], 3 Horns, 2 Trombones, Tuba) |
| Op. 50 | Sonata for Clarinet and Piano (1996, rev. 1997) for Clarinet and Piano |
| Op. 488 | Sonata for English Horn and Piano (2003) for English Horn and Piano |
| Op. 1121 | Sonata for Flugelhorn and Piano (2015) for Flugelhorn and Piano |
| Op. 651 | Sonata for Flute and Piano (2005) for Flute and Piano |
| Op. 571 | Sonata for Trumpet and Piano (2004) for Trumpet and Piano |
| Op. 701 | Sonata for Trumpet and Trombone (2006) for Trumpet and Trombone |
| Op. 704 | Sonata for Tuba and Piano (2007) for Tuba and Piano |
| Op. 573 | Sonata for Violin and Organ (2004) for Violin and Organ |
