I would like to change the QW sounds with the Q3 sounds because the Q1 explosions are too loud. I find the Q3 much more pleasant to listen to. Is this ok, or you would get kicked in some servers due anticheat, unpure pak files like it would happen Q3, unable to participate in some tournaments or anything else?

Yes, but you must feel guilt!

I was going to get this and in the comments it says its not accepted in the leagues:
https://gfx.quakeworld.nu/details/389/quake-3-soundpack/

Apparently you can use the hi def sounds from the release in ezquake
https://github.com/QW-Group/ezquake-source/issues/582

Anyone has the files?

I have some hq packs still don't know are they legal.. wait

Improved sound files.pk3 8mb
Seans_Better_Quality_Sounds_For_Quake.zip 62 mb

https://drive.google.com/drive/folders/1EB54wcWwceQmlhkhJtr9_Fcn54HScXm8

See if this is something for you: Moon[Drunk] sound pak?
Made it a long, long time ago for the same reason you mentioned.

But could you play all tournametns with that? I don't want to get kicked.

Ideally I would just use the Q3 pack but a comment says its banned in leagues.



Quake 3 Soundpack

Some custom items have been included over the years to pass the model check.
I don't know about this one, but the easiest way to find out is to download the sound pack, use "ruleset smackdown", join a server and type "f_modified +check" in console.

If you get a reply "all models OK", you're good, otherwise it lists the changed models and these are disallowed (just delete the pack again then).

Is there a list of items that are ok so I don't have to download the stuff and test it myself?

Allowed sounds in torunaments are very limited. If my memory serves me well:
* Mindgrid audio pack
* alternative Mega pickup sound

and thats it.

the sounds from the official remaster are allowed too (although bugged in the current version)
unfortunately theres no wiki page or anything for seeing what is and isnt allowed, you have to look at this file:
https://github.com/QW-Group/ezquake-source/blob/master/src/fmod.c

you can type to see what players are using on its own will explain what the letters mean
can also do to check just ur own models/sounds

in casual games you can use whatever sounds and models you want even if they dont pass the modified checks, but if ppl complain i guess thats on you.
In tournaments the rules usually require you to pass those modified checks though..