title: Changing playback speed in Exoplayer
body: <p>I'm looking to implement an audio player with variable speed playback (1.0x, 1.25x, 1.5x) like typical audiobook players currently on the market do. I would like to use Google's Exoplayer library as my audioplayer library however they don't appear to support variable speed playback. Any ideas on how to implement this, or any extensions that do support this?</p>