How can I turn the volume of a single sound effect in a doom wad

[StarSpun5000]

How can I turn the volume of a single sound effect in a doom wad? Do I need external editors and if so which ones?

[Kan3]

You need an external editor to turn the volume up (whatever editor you like, unless you need to modify a midi, then you need a specific one and that I actually don't know about), instead, if you need to lower the volume, you can use a SNDINFO lump or, if you use the sound in a function like PlaySound (script or decorate), you can define the volume in a parameter.