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Q126054: Location of Windows NT Multimedia Drivers in the Registry

Article: Q126054
Product(s): Microsoft Windows NT
Version(s): 3.5
Operating System(s): 
Keyword(s): 
Last Modified: 08-AUG-2001

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The information in this article applies to:

- Microsoft Windows NT Server version 3.5 
- Microsoft Windows NT Workstation version 3.5 
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SUMMARY
=======

This article contains the path to the 16-bit and 32-bit sound and video drivers
in the Registry used by Microsoft Windows NT version 3.5.

MORE INFORMATION
================

The Registry Editor looks similar to SysEdit. The Registry windows are labeled
as follows:

HKEY_LOCAL_MACHINE
------------------

This contains information about the local computer system, including hardware and
operating system data such as bus type, system memory, device drivers, and
startup control data.

HKEY_CLASSES_ROOT
-----------------

This contains OLE and file-class association data (equivalent to the registry in
Windows for MS-DOS).

HKEY_CURRENT_USER
-----------------

Contains the user profile for the user who is currently logged on, including
environment variables, personal program groups, desktop settings, network
connections, printers, and application preferences.

HKEY_USERS
----------

Contains all actively loaded user profiles, including HKEY_CURENT_USER, which
always refers to a child of HKEY_USERS, and the default profile.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers
-----------------------------------------------------------------------

Contains VIDC options, SndEvnts, Wave, and Timer drivers. It is similar to the
[drivers] section in the SYSTEM.INI file.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows

NT\CurrentVersion\drivers.desc
------------------------------

Shows installed drivers and the associated name. For example,
iccvid.dll:REG_SZ:Cinepak Codec by SuperMatch. It is similar to the
[drivers.desc] section in the CONTROL.INI file.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32
-------------------------------------------------------------------------

Contains the 32-bit drivers associated with wavemapper, wave1 and wave2,
msacm.imaadpcm, .msadpcm, .msgsm610, and vidc. Similar to the [drivers] section
in the SYSTEM.INI file.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MCI
-------------------------------------------------------------------

Contains the 16-bit sound drivers. Similar to [mci] section of the SYSTEM.INI.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MCI

Extensions
----------

Similar to the [mci extensions] section in the WIN.INI file.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MCI32
---------------------------------------------------------------------

Contains 32-bit mci drivers. For example, CDAudio:REG_SZ:mcicda.dll.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Midimap
-----------------------------------------------------------------------

Contains the name of the MIDI Synth driver.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\

CurrentVersion\Userinstallable.drivers
--------------------------------------

Indicates which wave channel the sound card uses.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WOW
-------------------------------------------------------------------

Options for 16-bit Windows applications running under Windows NT.

NOTE: These settings should be maintained only by the system.

HKEY_CURRENT_USER\Software\Microsoft\Multimedia\Audio Compression

Manager\NewPriority
-------------------

Contains driver priority settings from Sound Mapper.

HKEY_CURRENT_USER\Software\Microsoft\Multimedia\MCIAVI
------------------------------------------------------

Contains video playback options. For example, "Zoom by 2", and "Skip Video Frames
if Behind."

HKEY_CURRENT_USER\Software\Microsoft\Multimedia\msacm.imaadpcm
--------------------------------------------------------------

Contains the encode and decode rates set in Control Panel, Drivers, for IMA
ADPCM.

HKEY_CURRENT_USER\Software\Microsoft\Multimedia\msacm.msgsm610
--------------------------------------------------------------

Contains the encode and decode rates set in Sound Mapper.

HKEY_CURRENT_USER\Software\Microsoft\Multimedia\Sound Mapper
------------------------------------------------------------

Contains the settings from the Sound Mapper Sound Device Preferences.

HKEY_CURRENT_USER\Software\Microsoft\Multimedia\Sounds
------------------------------------------------------

Contains the Sound Events settings.

HKEY_USERS\S-1-5-...\Software\Microsoft\Multimedia\Audio Compression

Manager \NewPriority
--------------------

Contains driver priority settings from Sound Mapper.

HKEY_USERS\S-1-5-...\Software\Microsoft\Multimedia\MCIAVI
---------------------------------------------------------

Contains video playback options. For example, "Zoom by 2", and "Skip Video Frames
if Behind."

HKEY_USERS\S-1-5-...\Software\Microsoft\Multimedia\msacm.imaadpcm
-----------------------------------------------------------------

Contains the setting from Sound Mapper. Valid settings for MaxRTDecodeSetting and
MaxRTEncodeSetting are:

  0--      No rates.
  0x1--   8000 Hz mono.
  0x2--   11025 Hz mono.
  0x3--   8000 Hz stereo.
  0x4--   22050 Hz mono / 11025 Hz stereo.
  0x5--   44100 Hz mono / 22050 Hz stereo.
  0x6--   All rates.

NOTE: It is possible to manually adjust these values from the Registry Editor.

HKEY_USERS\S-1-5-...\Software\Microsoft\Multimedia\msacm.msgsm610
-----------------------------------------------------------------

Contains the setting from Sound Mapper. Valid settings for MaxRTDecodeSetting and
MaxRTEncodeSetting are:

  0--      No rates.
  0x1--   8000 Hz mono.
  0x2--   11025 Hz mono.
  0x3--   22050 Hz mono.
  0x4--   44100 Hz mono.
  0x5--   All rates.

NOTE: It is possible to manually adjust these values from the Registry Editor.

HKEY_USERS\S-1-5-...\Software\Microsoft\Multimedia\Sound Mapper
---------------------------------------------------------------

Contains the settings from the Sound Mapper Sound Device Preferences.

Additional query words: kbhowto multi media multimedia multi-media mmtitles

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Keywords          :  
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNT350search kbWinNTW350 kbWinNTW350search kbWinNTSsearch kbWinNTS350 kbWinNTS350search
Version           : :3.5

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