File Extension M4B

.M4B File

File extension: M4B
File type: Bookmarkable File
Do you have M4B - related issues?
First check your registry for hidden errors.


Notes about the M4B file extension:



Errors in your registry are one of the common causes for incorrect file associations on your windows system. It is highly recommended that you check your registry for file association errors (will also check for any other registry errors).

The M4B file type is primarily associated with 'MPEG-4 Audio Layer'.

Files in .M4A format are actually the audio layer of (non-video) MPEG 4 movies.

M4A is slated to become the new standard for audio file compression. This format is also known as Apple Lossless, Apple Lossless Encoder, or ALE. It is a new codec designed to provide lossless encoding in less storage space.

M4B files are M4A files that can be bookmarked, unlike their M4A counterparts. Thus, they are more often used for audio books and podcasts.

Detailed information for file extension M4B:


Primary association: MPEG-4 Audio Layer
File classification: Audio
Related links: Apple Quicktime, Windows Media Player, FILExt CODEC and Video Player FAQ



Important: When encountering any file extension issues it is always recommended that you run a free scan for Windows registry errors.

Technical data

To view technical data on file-extension M4B click this link to expand/hide the additional area.

System Info for File Extension .M4B

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: iTunes.m4b, FileType: AAC Audio File (Protected), AppName: iTunes
EXEFile: iTunes.exe

ProgramID: QuickTime.m4b, FileType: AAC audio, AppName: QuickTime Player
EXEFile: QuickTimePlayer.exe

ProgramID: QuickTime.m4b, FileType: AAC audio, AppName: QuickTime Player Application
EXEFile: QuickTimePlayer.exe

ProgramID: Microsoft.Zune.1.M4B
EXEFile: %ProgramFiles%\Zune\Zune.exe /Open

ProgramID: iTunes.m4b
EXEFile: D:\iTunes\iTunes.exe /open %L

ProgramID: QuickTime.m4b
EXEFile: %ProgramFiles%\QUICKT~1\QuickTimePlayer.exe %1

ProgramID: iTunes.m4b
EXEFile: %ProgramFiles%\iTunes\iTunes.exe /open %L

ProgramID: ACDSee 7.0.m4b
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\7.0\ACDSee7.exe %1

ProgramID: Winamp.File
EXEFile: %ProgramFiles%\Winamp\Winamp.exe %1

ProgramID: QuickTime.m4b
EXEFile: %ProgramFiles%\QuickTime\QuickTimePlayer.exe

ProgramID: DUP5.Files
EXEFile: %ProgramFiles%\Dragon UnPACKer 5\drgunpack5.exe

ProgramID: m4bfile
EXEFile: %ProgramFiles%\Media Player Classic\mplayerc.exe

ProgramID: ACDSee 8.0.m4b
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\8.0\ACDSee8.exe

ProgramID: ACDSee Pro.m4b
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\8.0.Pro\ACDSee8Pro.exe

ProgramID: iTunes.m4b
EXEFile: %ProgramFiles%\QuickTime\iTunes.exe /open

ProgramID: m4bfile
EXEFile: %ProgramFiles%\K-Lite Codec Pack\Media Player Classic\mplayerc.exe

ProgramID: MediaCenter.11.File
EXEFile: %ProgramFiles%\K-Lite Codec Pack\Media Player Classic\mplayerc.exe

ProgramID: ACDSee 9.0.m4b
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\9.0\ACDSeeQV.exe

ProgramID: ACDSee.m4b
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\5.0\ACDSee5.exe

ProgramID: MediaMonkey.M4BFile
EXEFile: %ProgramFiles%\MediaMonkey\MediaMonkey.exe

ProgramID: mplayerc.mp4
EXEFile: %ProgramFiles%\Recode Media\X Codec Pack v2\Media Player Classic\mplayerc.exe

ProgramID: mplayerc.m4b
EXEFile: %ProgramFiles%\Ringz Studio\Storm Codec\mplayerc.exe

ProgramID: iTunes.m4b
EXEFile: %ProgramFiles%\iTunes.exe /open

ProgramID: MediaMonkey.M4BFile
EXEFile: %ProgramFiles%\MEDIAM~1\MEDIAM~2.EXE


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Did you know

Everytime you install & uninstall software and modify system components your Windows registry is left fragmented with obsolete, corrupted and harmful files.

We recommend you run a free registry scan to identify the issues causing problems on your PC:


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