FaceTime Audio Coming to Macs With Next OS X Update: According to 9to5Mac, the FaceTime audio feature is "integrated deeply" into both the Messages and FaceTime apps, making voice communication between Apple users on any device easier than ever. With Messages, FaceTime, and FaceTime audio on iOS and OS X, Apple will have a complete communication system in place.
With a simple way to answer telephone calls and chat requests from all devices, those in Apple's ecosystem will have little reason to resort to alternative VoIP apps when communicating with other Apple users. FaceTime audio is also a high-quality VoIP choice, as it uses the AAC-ELD codec for Full-HD Voice. AAC-ELD is designed to provide CD-like audio quality for voice calls, delivering high speech and audio quality at a low coding delay.