[Openal] Realtek HD playing sounds intermittently

[Daniel PEACOCK]

Hi,

>>I've got another laptop, same hardware, but running Vista and that works
>>fine.
>Maybe this has a newer driver than the XP machine ?

On Vista the "Generic Hardware" is not available - so the "Generic
Software" device is being used, which apparently does work on Realtek
cards.

>The fault is in Realtek's DSound driver, not OpenAL.

I tend to agree as the "Generic Hardware" is just using generic
DirectSound3D and EAX extensions (EAX 2.0 on the Realtek).


On the XP machine, try going to the Windows Control Panel -> Sound and
Audio Devices ->Audio Tab -> Make sure the Realtek is the Default Playback
Device and click on Advanced -> Performance Tab.   There is a hardware
acceleration slider with 4 positions.

>From left to right these mean ...

(None) No DirectSound acceleration
DirectSound(2D) acceleration
DirectSound(2D + 3D) Acceleration
(Full) DirectSound(2D + 3D) acceleration and Property Set Extensions (e.g
EAX support)

Try lowering the slider one position at a time to see what needs to be
disabled to make things work.   I know that there are issues with EAX 2.0
because the Realtek drivers only support half of the EAX 2.0 features.

Bottom line is that on Realtek you need to be using the "Generic Software"
device.

Dan
Creative Labs, Inc.
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             Peter Mulholland                                              
             <darkmatter at bluey                                             
             onder.co.uk>                                               To 
             Sent by:                  "Tim Sorrells"                      
             openal-bounces at op         <tsorrells at breakawayltd.com>        
             ensource.creative                                          cc 
             .com                      openal at opensource.creative.com      
                                                                   Subject 
                                       Re: [Openal] Realtek HD playing     
             05/22/2008 09:26          sounds intermittently               
             AM                                                            
                                                                           
                                                                           
             Please respond to                                             
             Peter Mulholland                                              
             <darkmatter at bluey                                             
               onder.co.uk>                                                
                                                                           
                                                                           




Hello Tim,

Thursday, May 22, 2008, 5:05:38 PM, you wrote:

> I have a laptop running WinXP with a Realtek HD 883 chip installed. In
> our app we were seeing some sounds not playing at all, and of those that
> played, they would sometimes stop playing before reaching the end of the
> sound.  This behavior seems random as to which sounds will play and
> which won't.

<snip>

> This is all using the generic hardware driver, generic software works
> fine.

The fault is in Realtek's DSound driver, not OpenAL.

> I've got another laptop, same hardware, but running Vista and that works
> fine.

Maybe this has a newer driver than the XP machine ?

> Is there anything I can do to bring this hardware into compliance on XP
> or does it just not support OpenAL fully?

Look for an updated driver. If there isn't one, then complain to
Realtek.

--
Best regards,
 Peter                            mailto:darkmatter at blueyonder.co.uk

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