SOME instruments used in the Italian Opera

• Viols

 
The viol (also known as the viola da gamba) is any one of a family of bowedand stringed musical instruments developed in the mid-late 15th century and used primarily in the Renaissance and Baroque periods.

• Trombones

The trombone (German: Posaune, Spanish: trombón) is a musical instrument in the brass family. Like all brass instruments, sound is produced when the player’s vibrating lips (embouchure) cause the air column inside the instrument to vibrate.

• Cornettes
  

The cornet is a brass instrument very similar to the trumpet, distinguished by its conical bore, compact shape

• Traverse flutes
  
  A transverse flute or side-blown flute is a flute which is held horizontally when played. The player blows "across" theembouchure hole, in a direction perpendicular to the flute's body length.
• Lutes
  
  It is a plucked string instrument with a neck (either fretted or unfretted) and a deep round back

• Harps
  
  The harp is a multi-stringed instrument. Depending on its size, which varies, a harp may be played while held in the lap or while it stands on a table, or on the floor. Harp strings may be made of nylon, gut, wire or silk.
• Harpsichords
  
  
  A harpsichord is a musical instrument played by means of a keyboard. It produces sound by plucking a string when a key is pressed. The harpsichord was widely used in Renaissance and Baroque music.
• Organs
  
  The Organ is a keyboard instrument of one or more divisions, each played with its own keyboard operated either with the hands or with the feet. The organ is a relatively old musical instrument

• Bagpipes
  
  Bagpipes have been played for centuries throughout large parts of Europe, the Caucasus, around the Persian Gulf and in Northern Africa.
• Cromornes

Cromorne is a French woodwind reed instrument whose design originates in the early Baroque period in France

AND A LOT MORE!!!