I searched tutorial followed them and I can not make this mod work, I installed the forge, put the Sound-Physics-Mod-1.12.2.jar in the Mods folder put the Sound-Physics-Soundfix-Resource-Pack.zip in the resouce pack folder, and does not work! Can someone help me?

The resourcepack is not needed anymore if you're using my fork since there is an automatic stereo to mono downmixing of sounds. Are you sure you downloaded the right jar file though ? The latest one would be this one https://github.com/djpadbit/Sound-Physics/releases/download/1.0.8/Sound-Physics-1.12.2.jar.