the music is available in a variety of formats including high-quality MP3, FLAC or M4A lossless at CD quality and even higher-than-CD quality 24/96 WAVE. your link will include all options - all free. all downloads include a PDF with artwork and credits.
Click THIS LINK to go to the official Nine Inch Nails site where you can download his album "The Slip" for free.
Click THIS LINK to also download the Nine Inch Nails tour sampler with 6 tracks from various artists who will be performing on the tour.