About: http://webisa.webdatacommons.org/240763579

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I???m pretty shure that you can get a kind of square wave out of the audio signal.
http://www.w3.org/ns/prov#wasQuotedFrom	cycling74.com