Ophelie Markowski Vladimir, Christopher Benfield, Oscar Anton, Claude Debussy Impressionism, Folk World & Country, Pop
On the Green - Denny's Laendler Sarah Houle Trumpet, Baritone, Euphonium, Trombone, Tuba, Baritone horn Classical, Folk World & Country
A Day on the Mountain David C. Benner, Althea Wray, Wesley Pritchard, Ewart G. Abner Jr., The Magnificents, Florent Schmitt Piano, Flute, Guitar, Oboe, Harp, Clarinet Doo Wop, New Age, Rhythm & Blues, Gospel, Folk World & Country
Oogway Ascends Henry Jackman, John Powell, Gail Ford, Sheet Music Boss, Daniel Ibanez, Kyle Steindler Violin, Cello, Piano, Viola, Double Bass, Bass Gospel, Country, Children, Folk World & Country, Pop
Opus 59 - I spy classically John Trie Organ, Bass, Guitar, Bass guitar, Piano, Drum Set Stage & Screen, Folk World & Country, Pop, Jazz, Rock
Klezmer 101 Orchestral version from Klezmer Concerto for Clarinet and Wind Orchestra Clarinet Folk World & Country, Classical, Klezmer, Pop
Op.2 No.1 for string orchestra Stephen Lines Bass, Double Bass, Cello, Violin, Viola Classical, Stage & Screen, Folk World & Country
Opus 47 Antonin Dvorak, John Trie, Gary Bricault Soprano Saxophone, Tenor, Soprano, Tenor Saxophone, Baritone, Viola Folk World & Country, Romantic
Òran Chaluim Sgàire / Iolaire Sùil Na Grèine Julia Gordon Accordion Folk World & Country, Folk, Celtic, St. Patrick's Day
Opus Kenneth Pasciak, Ryuichi Sakamoto, Men I Trust Guitar, Viola Folk World & Country, Classical, Romantic
Orangenlied Antje Günther, Henning Gemke Piano, Guitar Rock, New Age, Classical, Folk World & Country, Blues
Opus 2 No.1 for Wind Quintet 2018 Chamber Music Contest Entry Stephen Lines Horn, Flute, Bassoon, Clarinet, Oboe Folk World & Country
Opus 35 John Trie, Dustin O'Halloran Banjo, Piano Folk, Folk World & Country, New Age, Classical, Pop
