Oh I guess that's the complex part!
I think your issue is with the ctc sound. Find UnRen (https://f95zone.to/threads/unren-bat-v0-8-rpa-extractor-rpyc-decompiler-console-...). use the executable to decompile Archive.rpa (it's the first option. Go to /game/music. You'll see a tiny file named CTC.mp3. Check if it is the sound that is annoying you. If it is, then back it up somewhere and replace it with an empty file with the same name. So copy it on another folder or simply rename it to CTC-Backup.mp3 and then right click> New>pick any type of document and rename it to CTC.mp3 (make sure you also change the extension). Voila, every time the game calls that music file, it will find an empty file and play no sound
We could modify the script to just not call that file at all but I'd rather not mess with the script.rpy file (if the dev wants to do that for you, awesome) but this is a much simpler way to override things.