Orchestra^[1][2] est grex musicorum, qui nostris temporibus sub directione ducis orchestrae plerumque ludunt.

Orchestra classica (etiam symphonica vocata) multa et varia instrumenta continet, quae in quattuor categorias disponere possumus:

I Instrumenta cum chordis

• Instrumenta cum arcu (sicut violina, viola, violoncellum, contrabassum)
• Instrumenta sine arcu (sicut cithara vel mandulinus)
• Claviaturae (sicut clavicymbalus)

II Instrumenta aerea

• Lignea (sicut tibia)
• Octones (sicut tuba gravisona)
• Cum aeris subsidio (sicut organum)

III Percussiones

• Metallo factae (sicut triangulus)
• Statutae (sicut tympanum)
• Non statutae

IV Instrumenta fulgure (sicut fulgure clavicymbalus)

Orchestra chordarum (quadricinium fidium) continet:

• violinas (primas et secundas)
• violas
• violoncella
• bassos duplices

Si orchestra musicam Baroccam cantat, additur clavicymbalus.

• Compositor
• Gamelan
• Instrumentum musicum
• Magister cappellae
• Musica classica
• Orchestratio^(en)

• Raynor, Henry. 1978. The Orchestra: A history. Scribner. ISBN 978-0-684-15535-7.
• Singleton, Esther. 1917. The orchestra and its instruments. Novi Eboraci: The Symphony Society of New York.
• Spitzer, John, et Neal Zaslaw. 2004. The Birth of the Orchestra: History of an Institution, 1650–1815. Oxoniae: Oxford University Press. ISBN 978-0-19-816434-0.