Microsoft KB Archive/126054

= Location of Windows NT Multimedia Drivers in the Registry =

Article ID: 126054

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Workstation 3.5

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This article was previously published under Q126054



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

Keywords: kbhowto KB126054

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