A Dutch website with excerpts of cantorial singing in the Dutch tradition, the Western Sefardic Music Tradition. According to Barry Mehler, the musical director of Santo Serviço (Portuguese Synagogue Choir), the melody of Mizmor leDavid was composed on commission for the Portuguese Synagogue in Amsterdam just after the turn of the (20th) century by Victor Schlesinger.
http://home.zonnet.nl/sondervanfrank/index.htm