Expanding on the trio setting of NY tenor saxophonist Ivo Perelman's "Strings 3" album, the 4th of the planned 7 CDs adds pianist Matthew Shipp to create a quartet that, while somewhat conventional on the surface, in practice emphasizes a string-like approach in both the woodwind and brass components, Shipp's perspective adding a unique dimension to the collective improvisation.

An inevitable meeting of New York luminaries, trumpeter Nate Wooley joins saxophonist Ivo Perelman with frequent sideman Matthew Shipp for an album of complex and sophisticated collective free improvisation, spectacular playing and like-minded conversation of incredible technique and lyrical innuendo; released with the quartet album "Octagon".