'Chippin' Away' is a newly recorded version of the Nash song released on his solo album 'Innocent Eyes' exclusive to this release. 'For What It's Worth' is a live version taken from the 'Allies' album.
Arc was a companion CD to Neil & Crazy Horse's 'Weld' Live Album. In Neil's words: 'A sonic collage' of 35 minutes of song fragments, distortion and growling feedback. This promo edited it down to 3:25 but its still just as headache inducing.