M4B (MPEG-4 Audiobook)
Apple audiobook container, with chapters and position marking. Same as M4A internally, but the player remembers where you stopped — it's the standard audiobook format on iTunes and Apple Books.
Yes, we support M4B!
Technical Specifications
Advantages
- High audio quality with a good quality-to-size ratio
- Suitable for professional and commercial transcriptions
- Accepted directly without needing conversion
- Automatic transcription with accuracy via AssemblyAI
Disadvantages
- Lossy compression — not ideal for final production masters
Use Cases
How It Works
Upload your file
Upload your M4B file via browser or drag and drop.
Automatic transcription
Our AI transcribes the audio with high accuracy in minutes.
Download the result
Download the transcription as text, SRT, VTT or other formats.
Yes, we support M4B!
Apple audiobook container, with chapters and position marking. Same as M4A internally, but the player remembers where you stopped — it's the standard audiobook format on iTunes and Apple Books.
Frequently Asked Questions
Does VoxScriber support M4B files?
Yes! VoxScriber fully supports M4B files. Simply upload your file and our AI will automatically transcribe it with high accuracy.
What is the audio quality of M4B?
M4B offers Very Good audio quality with Lossy compression. This makes it suitable for most transcription use cases — our AssemblyAI engine extracts audio accurately regardless of compression level.
How do I transcribe a M4B file to text?
Go to VoxScriber, upload your M4B file (up to 5 GB / 10 hours), select the language and click transcribe. Your result will be ready in minutes as text, SRT or VTT.