[Ham-Mac] iMac G5 sound problem - Solved!

[David Anderson GM4JJJ]

Well, I finally found the answer:

http://docs.info.apple.com/article.html?artnum=300832



Some audio applications may change your computer's audio settings to  
a sample rate that is too high for other applications to use. In this  
situation, system alert sounds still work, and does iTunes, but other  
applications may have no sound (audio output). This document applies  
to Mac OS X 10.3 or later and applications that use QuickTime 6 or  
later for audio, such as Safari and Quicktime Player.

This can happen on Macs that support high sample rates (higher than  
48000 Hz):

iMac G5
Mac mini
Power Mac G5 models that support sample rates higher than 48000 Hz
PowerBook G4 support sample rates higher than 48000 Hz


For example, if you play an Internet movie in Safari, it will make no  
sound; if you open a QuickTime movie on your computer, QuickTime  
Player reports the following error (and the movie will have no audio):

"You may experience problems playing a sound track in (Movie  
Name).mov because a software component needed by the movie could not  
be opened."

Solution

Open Audio MIDI Setup (/Applications/Utilities/), then check the  
Audio Output setting.
Change the Audio Output setting to 44100.0 Hz.
Quit Audio MIDI Setup.


Why does this happen?

Some third-party audio applications may change your computer's audio  
output setting. In fact, if you use the third-party application again  
after applying the above solution, the issue might occur again.  
Observe changes by watching the settings in Audio MIDI Setup before  
and after running a third-party application you suspect might be  
causing the issue. Contact the manufacturer of the application for  
more information.




On 29 Dec 2005, at 10:31, David Anderson GM4JJJ wrote:

> Further to my previous request for help:
>
> To try and track down whether the sound problem I have is caused by  
> Skype beta 1.4.0.33, I'm looking for someone who has that version  
> installed on their Mac and is willing to run a REAlbasic test  
> application I have made - all it does is make a sound when a button  
> is pressed - or in my case it doesn't :-(
>
> I tried another G4 that has Skype 1.4.0.27 and it works OK. I am  
> reluctant to ask anyone to upgrade to the later version in case  
> they end up with the same problem, but if anyone has already done  
> so then please get in touch.
>
>
> 73
> ______________________________________________________________________ 
> _____
> David Anderson, GM4JJJ         E-mail: david at gm4jjj.co.uk
> ______________________________________________________________________ 
> _____
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73
________________________________________________________________________ 
___
David Anderson, GM4JJJ         E-mail: david at gm4jjj.co.uk
________________________________________________________________________ 
___
Rotator Sales: http://www.braeside.plus.com
MoonSked software: Tracking, Prediction, Scheduling and much more.
Available for Linux, Windows or Macintosh. Also PalmTrack for Palm OS.
http://www.gm4jjj.co.uk/MoonSked/moonsked.htm
iCluster: Macintosh & Linux DX-Cluster Telnet access made easy!
Mac HP GPS Control: HP Z3801A Time & Frequency Standard software