Article ID: 179646
Article Last Modified on 1/22/2007
APPLIES TO
- Microsoft NetMeeting 3.01 Standard Edition
- Microsoft NetMeeting 2.11
- Microsoft NetMeeting 2.1 Standard Edition
- Microsoft Windows 98 Second Edition
- Microsoft NetMeeting 3.01 Standard Edition
- Microsoft NetMeeting 3.01 Standard Edition
This article was previously published under Q179646
IMPORTANT: This article contains information about modifying the registry. Before you
modify the registry, make sure to back it up and make sure that you understand how to restore
the registry if a problem occurs. For information about how to back up, restore, and edit the
registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
SUMMARY
This article describes how to disable DirectSound support in NetMeeting.
If NetMeeting cannot detect that your sound card driver does not support
full duplex in DirectSound, you need to disable DirectSound.
MORE INFORMATION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may
require you to reinstall your operating system. Microsoft cannot guarantee that you can solve
problems that result from using Registry Editor incorrectly. Use Registry Editor at your own
risk.
NetMeeting can use the DirectSound features of DirectX. DirectX is
included with Microsoft Internet Explorer and may be included with
some games or other multimedia software. DirectSound allows direct access
to hardware features on the audio adapter.
NetMeeting 2.1x
To disable DirectSound support in NetMeeting 2.1x, change the value for the
DisableDirectSound value to "01 00 00 00" in the following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Audio\NacObject\DisableDirectSound
After you make this change, restart NetMeeting.
The following values determine whether DirectSound support in NetMeeting
is intentionally disabled or enabled:
- 00 00 00 00: NetMeeting detected that DirectSound support can be used
with full duplex.
- 01 00 00 00: DirectSound support is intentionally disabled.
- 02 00 00 00: NetMeeting detected that DirectSound support cannot be
used with full duplex.
- 03 00 00 00: DirectSound support is intentionally enabled.
NetMeeting requires DirectX 5.0 to support DirectSound functionality. If
DirectX 3.0 or earlier is installed, "00 00 00 00" is the default value,
but you do not have DirectSound functionality.
When NetMeeting (Conf.exe) starts, it first checks the registry key listed
above, and continues if the value is "01 00 00 00" or "03 00 00 00." If
the value is "00 00 00 00" or "02 00 00 00," NetMeeting tests the full
duplex functionality of the audio adapter with DirectSound and sets the
value in the registry to either "00 00 00 00" or "02 00 00 00."
Afterwards, Nac.dll loads and examines this value.
The registry value can change after you run the Audio Tuning wizard or
change your audio device, but the change does not take effect until you
restart NetMeeting.
Windows 98 Second Edition and NetMeeting 3.01
To disable DirectSound support, follow these steps:
- In NetMeeting, click Options on the Tools menu.
- Click the Audio tab, and then click the Enable DirectSound for improved audio performance checkbox to select it.
Additional query words: half broken interrupt interfere 3.0 3.00
Keywords: kbhowto kbenv kbsound KB179646