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Level 1

0 points

Audio not working on 27" display, Mac Mini

I received my new display last week - was working great, including the sound. Now, I can't get any audio output out of the display at all. (Switching to the built-in internal speaker works fine, so I know it's not a general issue.) I installed the relevant software update soon after plugging in the display.

This seems like a software issue to me because some other things are weird. When the audio output is set to Display Audio, changing the volume up and down is very slow instead of instant. It actually takes a few seconds to register the up or down volume keypress. If I drag the volume slider in system preferences > Audio, I even see the wheel icon spinning for a while. Although no volume setting results in any sound output.

I restarted the computer and unplugged / replugged both the mini display port and the USB connection. Any ideas?

(The display part works fine, BTW!)

Thanks - ATM

Mac Mini (not the latest one but one generation previous), Mac OS X (10.6.4)

Posted on Oct 4, 2010 8:41 AM

34 replies

Mitch 751

Level 6

11,624 points

Nov 9, 2010 11:12 PM in response to newpixel

See if this helps, I tried that and have been working for more than 24 hours

Open the Audio Midi Setup -> Go to Display Audio (or LED in some case), change the Output settings:-

Format : 48 Hz 2ch-24bit

No sure it solves but still under testing, so far so good

Nov 17, 2010 10:15 AM in response to atmcclain

Same thing happening to me, changing the volume up and down is very slow instead of instant, audio from display will not work. Recently purchased Apple LED Cinema Display (27" flat panel). Any resolution or help/communication/update from Apple?

-Thanks

msbohn

Level 1

15 points

Nov 19, 2010 2:42 PM in response to atmcclain

+1
I don't have sound from my 27" Cinema (MBP). It worked the first time I used it but now it doesn't. The volume slider works intermittently like others have found.

I'm not a big fan of rebooting my Mac every time I use it. That is the method for solving Windows problems, not OS X problems.

Fortunately, the sound quality from the monitor doesn't motivate me to do much about this problem. 🙂

fox7

Level 1

4 points

Dec 15, 2010 3:26 PM in response to atmcclain

The fix for the problem is now available from Apple:

http://support.apple.com/kb/TS3602

Audio not working on 27" display, Mac Mini