Spotify has quietly rolled out its latest feature: a time machine. Accessible through a dedicated site, "Taste Rewind" accesses your current Spotify collection to suggest decade-specific playlists. The idea is to time-shift your current tastes to help open your mind to music from other eras. It works pretty well. After you log into the site, the process starts by asking you to select "three artists that you love" from a small but diverse selection (I went with Tom Waits, Jurassic 5 and Sia). It'll then craft a set of five playlists; one for the '00s, '90s, '80s, '70s and '60s. The site lets you preview the first track on each, share them or add them to your Spotify account.