Basso continuo is the bass line and chords in baroque music, often played by the harpsichord and cello
Solo - 1 player
Duet - 2 players
Trio - 3 players
Quartet - 4 players
Quintet - 5 players
Sextet - 6 players
Septet - 7 players
Octet - 8 players
An orchestra consists of strings, woodwinds, brass and percussion
a chorus is a vocal ensemble who sing the choral parts in an opera, oratorio or musical
A trio sonata is a work in several movements in the baroque era for 2 soloists (usually violins) and a basso continuo (which counted as one instrument, despite usually being made up of the harpsichord and cello)
A string quartet is made up of 2 violins, viola and cello
A rhythm section is made up of a drum kit, bass, and keyboard/ guitar playing the chords
A jazz/blues trio consists of a piano, double bass, and a drum kit