Hello Everyone,
I'm not an Apple TV user, but I've stumbled on this thread after searching for a solution for my Macbook Pro (late 2013) audio drops during video playback.
I'd like to add an important fact about the described bug. This is not just happening with Apple TV.
For a long time, I am seeing audio drops problems while streaming video using Plex to my Google TV. At first I thought this was a Wifi problem (since Apple acknowledged wifi problems fixed in the recent Yosemite updates), nevertheless, the problem still happens.
Then I thought it was a problem with my Google TV's optical out, so I switched to audio through its HDMI out. But the problem stayed.
Today, this bugged me so much while watching a film, I connected my computer to the TV directly with an HDMI cable (instead of streaming through the Google TV), in hope this will solve the problem. However, even with the cable running directly from the computer, and checking both Plex and VLC, the audio still dropped for a few seconds every once and awhile while video kept playing.
In any case, I'm not sure what the cause of the problem is, but it seems it is not wifi related. Wish I knew more.
Any thoughts would be welcomed.