Topic on Talk:Quake Enhanced
The author of the Quake EX patch has confirmed the music is no longer quiet and there doesn't appear to be sound clipping in the first major update for Quake (2021).
• https://steamcommunity.com/app/2310/discussions/0/3035976838037677927
I can also attest to this since I did a clean re-install of my game when the patch arrived and I didn't need to use this patch to fix the music and sound issue from the previous build.