http://www.chambersingers.org/ A 46 voice choir performing a wide range of music repertoire, from Renaissance through significant 20th century works. California. http://www.rubyred.demon.co.uk/ 35-40 voices baroque choir from London, England. http://www.orlandosingers.freeserve.co.uk/ A chamber choir of twenty or so voices, based in Cambridge, England. The choir's repertoire has ranged from the 15th century to contemporary works. http://www.orlandosingers.co.uk/ One of Southern England's most exciting and ambitious chamber choirs. From Dorset. http://listen.to/OPMS The group will sometimes be as small as a dozen, increasing to around forty for Romantic Music or music with an orchestral accompaniment.