We're running a 13-inch, early 2014 MacBook Air and a current-gen AppleTV. After upgrading to Yosemite Thursday night AirPlay mirroring and streaming to the AppleTV seems to be goofed up. We'll get picture on the tv, but no sound on either the TV or the MacBook. Sometimes AirPlay will auto-connect to the AppleTV and refuse to disconnect, making testing extremely difficult, and, again leaving us with no audio. Even after rebooting. I've gone through and worked with the sound settings through System Preferences, but to no avail. Are we the only ones experiencing this? Is this a known-issue, or do I need to report it to Apple?