Hi use AE for some time and I have never this thing happened. In practice with the DC version 2015 (latest available), I experienced an issue in sound output. When I create a video with an audio track it is not played at the end of rendering, comes a video mute with only pictures. Using Windows 10, and I've tried to change the settings of the audio out. Uninstalled the product plugins that I had (trapcode). To no avail. Some solution or is a bug in this version?