How Did John Zorn Write 300 Songs in 90 Days?

From Nicholas Tozier:

In 1990, New York-based composer John Zorn challenged himself to write one hundred tunes in one year’s time. Each of the hundred tunes would touch on the Jewish musical tradition, and would follow some basic guidelines: a maximum number of staves; the use of certain musical scales… and the tunes would have to be playable by any small ensemble of instruments. How could Zorn know, as he composed the Masada Songbook’s first short melody, that he was embarking on a project that would unfold over the next two decades of his life?