On the material of the album, Omar states:
It was all new Mars Volta material. I don’t really differentiate between the two other than I try to place the most accessible material with the Mars Volta. I hand a finished recording of the music to Cedric, he creates his parts, and the CD is finished when we record them. I expect the band to learn the songs as we create them.
You can read the rest of the interview here.
THE MARS VOLTA live: