https://youtu.be/kD_y5HJ8A4EThis composition is a setting of a passage from the Tefila Nishmat Kol Chai. It was written in Amsterdam in the early part of the 18th century by Abraham de Casseres, who was the community's musician in residence between about 1720 and 1740. Although the original score includes an instrumental accompaniment, it must also have been sung a cappella, as according to the late Professor Israel Adler, it was sung on three occasions in the Esnoga's calendar when the playing of musical instruments would have been halachically prohibited: Shabbat Nachamu (the anniversary of the synagogue building's opening in 1675) Simchat Torah and Shabbat Beresheet.You can download an mp3 here: http://danielhalfon.com/multitrack-recordings/