HDMI No sound youtube.com only

[auto180sx]

Hey guys! First post, second day as a Macbook Pro owner!

2011 13 inch Refurb
2.8 I7
Most current version of Mountain Lion
Upgraded to 16GB Ram
256GB Samsung 840 Pro SSD
750GB HDD in the superdrives bay

Coming from Windows based machines and this being my first Mac, I love it! There is one tiny problem. The computer is hooked up to my HD TV through a firewire to HDMI cable, sound turned to HDMI (Listening to the Pandora app through the TV currently, and just finished Pulp Fiction running off the computer so I know the sound works.) The thing is, youtube.com does NOT play sound.

How can I fix this?

Edit: Using Google Chrome as my browser.

 

[GGJstudios]

Do you have the volume muted or turned down on the YouTube control?

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[auto180sx]

Do you have the volume muted or turned down on the YouTube control?

View attachment 388006​

Haha, first thing I checked. Its all the way up.

 

[GGJstudios]

Haha, first thing I checked. Its all the way up.

Have you tried audio from other sites with Chrome? Have you checked your Chrome preferences, plug-ins, etc? Have you tried Safari?

 

[Peace]

Are you watching any video that is HDCP ( content protected ) ? If so I don't think Firewire is HDCP compliant .

 

[TOMDAVIES920]

I'm having the same problem with any site playing audio through google chrome yet safari is working fine. Not sure what the issue is as it was working fine a few hours ago.

 

[Peace]

Are you sure you're using a firewire to HDMI cable ? I don't think there is such a cable.

 

[auto180sx]

Sorry Thunderbolt to HDMI.

Its fixed though.

Just go to: Applications>Utilities>Audio MIDI Setup
Using the Audio Devices TAB at the top, make sure that the "Properties
For:" is set for Built-In Audio
and the Audio Input and Audio output are set at 44100.0Hz

Fix my problem, from what I've read some applications change the sampling rate that is not compatible to youtube, vimeo, ect.