I was on the public beta of Yosemite when that was going on. For a while after i first updated, calls i made or received from my Mac were fine. Then not long after that without anything changing, people started telling me that i sounded muffled. over facetime audio and regular calls now i'm on the release build and just now had someone tell me the same thing. it was a facetime audio call. right before that as well i had a regular voice call come in on my phone and i answered it on my Mac and it said it failed. a message on my phone came up and said that it had failed handing off the call to my Mac. Anybody have any ideas?