For example, when the bytes indicating the length of theĪudio data become 0, the file can not be replayed any more on iPhone,īut, in some cases you can fix the broken header by yourself byĮxtracting the audio data, encoding it, and putting it into the new The m4a files get broken when some parts of header lost correct

Recorded with other programs like QuickVoice or on Android. It is audio data encoded in the AACįormat and encapsulated in MPEG4 file container. Voice memoįiles have the extension “m4a”. I will show you the steps in this article.

How to fix corrupted voice memo (m4a) files.ĭo you have broken voice memo files? You can fix those files by Īlso pasting instructions in case the link goes down in future: Afterwards, the m4a file plays! Note: this is completely free. This guide worked 100% for me - it takes you through each step. Many thanks in advance for any thoughts/suggestions you might have, Can anyone suggest a way that I might be able to get access to this file without paying lots of money? It seems like it should not be difficult but I just don't seem to be able to find the key to the puzzle. The only problem is that they want about $90 for what looks like a pretty simple fix. There is also a preview that sounds right.

It came up straight away as a 1 hour 25 minute sound file with a 95% 'repair score'. I am using a Mac with Mavericks installed. The relevant file shows up as having 21MB (about the right size) and appeared to be recording normally, but when I tried to play it (using Notability or any other player - tried Quicktime, Real Player, Audacity, VLC and WondersharePlayer) it shows up as having zero duration. This app has always worked well before but for some reason there was a problem this time. I recorded an 85-minute AAC/m4a file using Notability on my iPad.

Open m4a in audacity