Airplay Mirror, video yes, audio no?

Question

I guess I have a "good enough" Macbook Pro from last year.  I can mirror the video(which I figure is the hard part), but I have been thrown back into the silent film era, no sound! When I go to "System Preferences" and then click on "Sound" I can't click on APpltv or Airport express...what am I missing?  Or is this a version .1 glich?

Answer 1

You might also make sure the two audio clips you want to join are on (1) the same track, and (2) that track is a storyline.  Transitions in general do not work when clips are not on a storyline track.  Here's what the manual says about it ...
stephen
Add an audio crossfade
When a video clip has attached audio, the audio automatically has a crossfade transition applied when a video transition is applied. If the audio is detached or expanded from the video, the audio is not affected by the video transition. Follow these steps to add an audio crossfade between detached audio clips that are in a connected storyline.
Create an audio-only storyline that is connected to the primary storyline.
For information on creating storylines, see Add storylines.
Using the Select tool, click the edge of a clip (an edit point) in the storyline.
One or both clip edges are highlighted.
Note:  If you select a whole clip in the storyline instead of just an edit point, transitions are added at each end of the selected clip.
To insert a crossfade, choose Edit > Add Cross Dissolve (or press Command-T).
The crossfade is inserted using the “Apply transitions using” setting. For more information, see Set transition defaults. You can configure the fade-in and fade-out settings in the Transition inspector.