Chamber group without a website?

• Musical composition — tonne (anag)
• The Muses e.g
• Group included in ban on Etonians
• Piece contributing to compilation one thousand
• Triple trio
• Nine singers singing
• Piece with nine parts
• Medium-sized jazz combo
• 9-person musical group

Wikipedia Word definitions in Wikipedia
Franz Lachners Nonet in F major is a composition for chamber ensamble published in 1875.