M4A VS M4B: What is the difference?
You may notice that the format of the audio files in iTunes will be different. M4A and M4B are the most similar. Both are used as audio file formats. So what are the differences and similarities between them?
Encoding method and format protection
The M4A and M4B formats are basically the audio file extension of the MP4 codec and are encoded by AAC (Advanced Audio Coding). M4A is mainly for the music file format while M4B is for audiobooks from the iTunes store. ITunes digital content is protected by Apple’s Apple FairPlay DRM. However, M4A is not protected by DRM. Music from iTunes and Apple Music are in M4P format, which refers to Apple’s M4A version that includes DRM. In comparison, M4B has both DRM-ed and DRM versions in audiobook files. Audiobooks purchased from the iTunes Store are all in DRM encryption, while these DRM-free M4B audiobooks can also be found online on their own.
Compatible / compatible M4A and M4B devices
As for DRM-ed M4B, it supports less devices. It is compatible with iPhone, iPod, iPad, etc. Also, DRM-protected M4B and M4B will be available on other devices and media players if those devices and media players support the formats.
M4B audiobook bookmarks
Compared to M4A, one of the most obvious features of M4B audiobooks is the bookmarks. The bookmark is applied to audiobooks, allowing you to skip the last part you read. This feature saves you a lot of time as you don’t have to search for the exact point you want to send. However, M4A music files do not have bookmarks.
Also, another feature of M4B audiobooks relates to the audiobook chapter settings. The audiobook is divided into its chapters, which makes it look like a physical book and is more readable for users.
conclusion
As we can know, the M4A and M4B formats are related to the MPEG-4 format and are represented by audio files. In these two cases, there are both differences and similarities. Its main difference is related to the fact that M4A is a music file extension while M4B is an audiobook. Also, M4A is completely unencrypted with DRM, while M4B is DRM-free and DRM-free.
