This tutorial video will show you step by step how to remove audio from a MKV video file (permanently) using MKVToolNix (FREE).
This will permanently delete sound from a MKV video file.
MKVToolNix is a handy set of free tools to create, alter and inspect MKV video files.
MKVToolNix can run on a Windows PC (7, 8, 8.1 and 10) and on a MAC computer.
MKVToolNix download page: https://www.fosshub.com/MKVToolNix.html
Website: https://mkvtoolnix.download/