Just downloaded your .amr file. I opened it in my DAW and converted into mp3. It's playing without jumping ahead. It's 12 minutes 24 second long.
Contact me. I will send you the mp3 version. If you get satisfieMore
I have worked as audio producer on a local radio station in Croatia. I have many years of experience in audio editing and production.
I have fixed your file, and now it is rendered as mp3.
Hit me up if you need tMore