Question

which is the only known secular music by praetorius

Answer 1

First name was Michael Praetorius. It was Sing Dem Herrn. The reason there was only one song because it wasn't a usual thing the start dropping different beats. But in the end all these composers pushed humans to a new era. 

Answer 2

Answer:

  Michael Praetorius (1571-1621) was one of the most important Lutheran musicians of the early 17th century. Michael Praetorius is the author of a vast work encompassing sacred and dance music.

  His song Sing Dem Herrn (2-5 Voices Choral Octavo), is known as his only secular composition.

    Named for Michael Schultheiss, German composer, one of the most important Lutheran musicians of the early 17th century. He is the author of a vast work, covering sacred and dance music, as well as Syntagma musicum (1615-1620), an important treatise on music theory and instruments.