Are you thinking of a Cantata? These can be performed with or without scenery, costumes and acting. Earlier ones were acted but as they developed, they were just performed without acting.
Concerto
Yes, the ritornello principle is based on alternating sections from the soloist (or soloists) and the full orchestra.
Webster defines a concerto as a piece for one or more soloists and an orchestra with three contrasting movements.
Only in the mouths of the vocal soloists, if they were singing along with the orchestra.
LINDEN LEA (song) ON WENLOCK EDGE (song cycle for voice, piano and string quartet) SYMPHONIES 1-9 (including no. 1, 'A Sea Symphony', for soloists, chorus & orchestra; no. 2, 'A London Symphony'; no. 3, 'A Pastoral Symphony', really a meditation on his experiences in World War I; and no. 7, 'Sinfonia Antartica', re-worked from his score for the film 'Scott of the Antarctic'.) FANTASIA ON A THEME BY THOMAS TALLIS (strings) THE LARK ASCENDING (for violin and small orchestra) JOB: A MASQUE FOR DANCING (ballet and concert score) MASS IN G MINOR (choral, unaccompanied) SANCTA CIVITAS [The Holy City] (soloists/choral) FLOS CAMPI [Flower of the Field] (viola/chorus/orchestra. Wordless, but founded on the Song of Songs) FIVE TUDOR PORTRAITS (soloists/chorus/orchestra) SERENADE TO MUSIC (for 16 soloists and orchestra. Written for Sir Henry Wood's golden jubilee, it sets words from Act 5 of Shakespeare's 'Merchant of Venice') DONA NOBIS PACEM (soloists/choral) HODIE [This Day] (Christmas work of original music for soloists, chorus & orchestra) HUGH THE DROVER (Opera) SIR JOHN IN LOVE (Opera based on Shakespeare's 'Merry Wives of Windsor') THE POISONED KISS (comic opera with some dialogue) THE PILGRIM'S PROGRESS : a Morality (Opera based on Bunyan's book) RIDERS TO THE SEA (one-act opera setting J. M. Synge's eponymous play almost word-for-word) '49th PARALLEL' [US title: 'The Invaders'] (score for the Powell/Pressburger film) 'SCOTT OF THE ANTARCTIC' (film score)
An oratorio is a musical composition for choir, soloists, and orchestra that tells a story often of a dramatic or religious nature. It typically combines vocal and instrumental elements to convey the narrative.
A concerto is a musical composition that features a solo instrument accompanied by an orchestra, while a symphony is a musical composition for a full orchestra without any soloists.
Concerto
You could be describing opera or an operetta or a work in musical theatre.
An oratorio is a large musical composition comprised of an orchestra, a choir and soloists. Similar to an Opera in the story telling, but different in it is just music not singing. Baroque references the time frame of 1600-1750 when the oratorio was written.
Yes, the ritornello principle is based on alternating sections from the soloist (or soloists) and the full orchestra.
Messiah is the most famous oratorio composed by the Baroque composer, Handel. It does not feature a single set of lyrics or a firm beat (riff) as in popular music. It is composed for the Baroque orchestra, choir and vocal soloists. It is based on biblical text.
Webster defines a concerto as a piece for one or more soloists and an orchestra with three contrasting movements.
Only in the mouths of the vocal soloists, if they were singing along with the orchestra.
Zagreb Soloists was created in 1953.
A concertino, or small group of soloists (usually 2 violins, a harpsichord, and a cello), contrasts with the cocerto grosso, which is the whole string orchestra and its ripieno players.
English Baroque Soloists was created in 1978.