What is a polychord?

Which instrument/s in this selection is/are not usually associated with traditional góralski dance music??

a. ?basy. b. ?violin. c. ?whistle and vocal call. d. ?drums.

Which of the following was not one of the limitations of early sound recordings?

a. instruments had to be placed at different distances from the recording equipment b. drums were sometimes omitted (or replaced with woodblocks) because they disrupted the equipment c. recording companies were not interested in recording jazz since it did not sell well d. recordings were limited to about three minutes in length