男声合唱

O Sanctissima Maria - TTBB

O Saviour of The World

O Schwabenland, mein Heimatland（男声版） [Choir B1 part]
Waltz for Male Choir and Piano Accompaniment

O Schwabenland, mein Heimatland（男声版） [Choir B2 part]
Waltz for Male Choir and Piano Accompaniment

O Schwabenland, mein Heimatland（男声版） [Choir T1 part]
Waltz for Male Choir and Piano Accompaniment

O Schwabenland, mein Heimatland（男声版） [Choir T2 part]
Waltz for Male Choir and Piano Accompaniment

O selige Nacht

O Who Will O'er The Downs So Free

O Youth Whose Hope Is High for TTBB Chorus

O! All Ye Ladies Fair and True

O'Isis and Osiris (TTBB)
Arranged from The Magic Flute for Male Voice Choir

Octet for Strings

Oculi Omnium

Ode auprès des Roseaux
aus Schilflieder

Ode D'Horace 4 Vx Hom.

Offrande
for men's choir (or mixed choir)

Oh! The Noble Duke of York (TTBB)

Old American Songs I, No. 1 Boatmen's Dance (TTBB & piano)
No. 1 Boatmen's Dance

Old American Songs I, No. 2 The Dodger (TTBB & piano)
No. 2 The Dodger

Old American Songs I, No. 5 I Bought Me A Cat (soloists (TTB), men's choir (TTB) and piano)
No. 5 I Bought Me A Cat