What happened? Everything greyed out.

[katiek31674382]

Can someone tell me what happened here and how I can reverse? When I hit play, the marker and time move forward but there is no sound:

[Charles VW]

This thread probably isn't best in the SDK forum (probably better here: Audition CS5.5, CS6 & CC

However, you've disabled each of the channels. To re-enable press the ​[ L ]​ and ​[ R ]​ buttons in the vertical ruler on the right-side.