How can i create a soundpack in minecraft?

Ex
3

Hey the soundpack i already have, the problem is i added a bigger new audio file but now i can hear the whole map and the other sounds when i adjust the volume you can hear the difference. What can I do against it?

Ar

Go back to 1.8.9, get the sound files from the Java file (with 7zip or similar) and put them in your resource pack

Ex

That's not the problem, I just want to put in long music with volume.

Ar

Then you need to replace the corresponding files in the sounds folder?