They were placed in tombs along with a bunch of other grave goods
Non-Pitched Percussion instruments are what most people call drums. They do not necessarily have a definite pitch. Non-pitched percussion instruments include snare drum, bass drum, cymbals, tambourine, triangle and many others.
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The process by which a record producer or music producer oversees the recording and production of a single,track, or record.
(My translation may not be the best sry)