chamber orchestra
US /ˈtʃeɪm.bər ˌɔːr.kɪˈstrə/
UK /ˈtʃeɪm.bər ˌɔːr.kɪˈstrə/

1.
Kammerorchester
a small orchestra, typically with 10 to 40 players, that plays in a small hall or chamber
:
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The chamber orchestra performed a beautiful Mozart symphony.
Das Kammerorchester spielte eine wunderschöne Mozart-Symphonie.
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They are looking for new musicians to join their chamber orchestra.
Sie suchen neue Musiker, die ihrem Kammerorchester beitreten.