These were later expanded and a fourth part was added via the nin:access iPhone app and the "Listen" section of [[nin.com]]. They were again modified each time as they were posted on the official NIN SoundCloud account, [[Trent Reznor]]'s official Spotify account and the official NIN Beats Music account.
The collection amasses over 100 songs across its various iterations, and recent versions of ''Quiet Tracks'' also contain tracks from Reznor and [[Atticus Ross]]' s scores for ''[[The Social Network Soundtrack|The Social Network]]'' and ''[[The Girl With The Dragon Tattoo Soundtrack|The Girl With The Dragon Tattoo]]''.
==The Singles==