Muteing spells?

[choweyiii]

Is there a field that specifies the spell's sound that I could change, or is there any other way to mute a spell that's been swapped? Any useful comments will get rep!

[I Hypnotoad I]

Find the sound that the spell makes (Search every type of dbc with the name spell in it (spell.dbc))
and replace the sound with your own. In this case, a blank wav.