“Radiohead, the respected British rock act, said that the band would sell its new album, at least initially, exclusively as a digital download and allow fans to decide how much to pay for it, if anything.” The album, “In Rainbows,” is to “be sold as a download without copy restriction software, known as digital-rights management. In effect, the band is asking fans to establish a monetary value for music, even when widespread piracy means that it would be available free.”