Short and Advent by Valerie Floeter  contains 16 miniature sacred solos, each about a minute long,  perfect for Advent worship occasions.  There are many occasions when a piece of less than a minute fits the requirement. Short and Advent contains the following titles –

Arise, O Christian People (AUS MEINES HERZENS GRUNDE)
As Angels Joyed with One Accord (PUER NOBIS NASCITUR)
Come, O Long-Expected Jesus (ST. HILARY)
Come, O Precious Ransom, Come (MEINEN JESUM LASS ICH NICHT)
Comfort, Comfort All My People (FREU DICH SEHR)
Hark! A Thrilling Voice Is Sounding (MERTON)
Hark the Glad Sound! The Savior Comes (CHESTERFIELD)
Jesus, Your Church with Longing Eyes (O JESU CHRISTE, WAHRES LICHT)
Lift Up Your Heads, You Mighty Gates (MACHT HOCH DIE TÜR)
Lift Up Your Heads, You Mighty Gates (MILWAUKEE)
Oh, Come, Oh, Come, Emmanuel (VENI, EMMANUEL)
Rejoice, Rejoice, Believers (HAF TRONES LAMPA FÄRDIG)
Savior of the Nations, Come (NUN KOMM, DER HEIDEN HEILAND)
The Advent of Our King (ST. THOMAS)
The Bridegroom Soon Will Call Us (ACH GOTT VOM HIMMELREICHE)
There’s a Voice in the Wilderness Crying (ASCENSION)

Sample