No Audio w/ Audio Sink

I am running Ubuntu 14.04 and just got GRC up and running.

I have made the sketch seen in this youtube video

http://www.youtube.com/watch?v=N9SLAnGlGQs

but I cannot for the life of me, get the audio sink to work.

Everything seems to be running just fine, but I can’t hear a thing
though my speakers.

Any help would be much appreciated.

Thanks,

Zack

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