Audacity Forum

Yes, I have now asked Adithya whether he could explain how he fixes such corrupt files. I do have one file that is affected at the moment, but I would rather see a general guide, since I expect to have more such files in future. Besides, it would be educational, not only to me but also to many other...

I tried mp4repair.org three years ago for a .3gp audio file on my Galaxy S4 recorded as AMR, and it worked in the end, after I had contacted them. I am however still looking for a way to do this for free.