Unknown audio file format

Regards to everyone on the forum! I’ve come across at an unknown audio file format and would like to see if I anyone has any idea what it might be. I attached a sample of it and set an extension to mp3 just to be able to upload it but it isn’t an mp3 file. I checked it with a hex editor and found that it has 72-byte data chunks where each even chunk starts with a 4-byte header FF 4E 14 47 and each odd chunk starts with a 3-byte header 92 D3 A4. This audio is extracted from an audio ‘container’ file used by a pen book reader. I checked many audio file formats but none of them even closely matches the structure of this file. Is it possible that the file is encrypted and that the player inside the pen decrypts the file ‘on the fly’ while playing it? Are there players that do such things? Or is it just a proprietary file format developed by the pen manufacturer?

Who is the manufacturer? did you contact them? What did Google have to say about it?

If you’re on Windows, you can force it to show you filename extensions. People forget Windows intentionally hides them.

Hidden File Extensions
– Start > My Computer > Tools > Folder Options > View > [ ] Hide Extensions for Known File Types (deselect)
– Apply (to this folder) or Apply to All Folders
– OK

You can also install the FFMpeg software and that will recognize many more file types than Audacity alone.



Thanks, I’ll try with FFMpeg. Google and the manufacturer did not say much, unfortunately.

And you’re determined not to tell us what they are?

The seller is at www aromah com/?page_id=124 , the head office is in Sharjah, UAE, and the main office is in Binnish, Syria. They didn’t reply to my enquires and I would suspect they didn’t care about explaining internals of their product which aren’t supposed to be available to customers anyway.