One, two, three, four! ... he said, a protest song depends on three legs: ... there were only a few widely recognized genres and a limited number of radio stations," Lubet said.

Project Song challenges musicians to write and record a song in just two days — and we shoot video of the whole process. ... Moby: One Song, Two Days, Three Versions. May 4, 2010 12:01 AM ET. By .