Mac with Plasma hook up but no audio

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Hello, I connected my Macbook to my Plasma 52 inch, using an adaptor and HDMI cable. I don't have audio to my Plasma without hooking up additional cable for Audio. I'm using a jack from my mac to a receiver on Aux.
My question is if I am using a HDMI cable where is my Audio?

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Posts
19532
Registration date
Wednesday October 8, 2008
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Contributor
Last seen
June 15, 2019
1,910
If your using a DVI to HDMI adapter then you will not have an audio signal to the TV. Only computers with an integrated HDMI port and the proper audio hardware will have sound on the HDMI port.