Rename The audio File you downloaded to one of the matching Id's below to get the effects on that voice.
I have also included my notes on all the of audio files I have identified by EAR, in case you want to experiment or see if you can find a match for voice 5.
Refer to the Doc SPELLS.TXT

Activation on the Unique SFX seems about a 1/4 - 1/3 chance.


IGNIS-Pronunciation of Fire Bolt 

VOICE 1.
274414323- Spell Level 1





VOICE 3.
334291524- Spell Level 1
1033913536- Spell Level 1(Slightly different pronunciations than one above??)





VOICE 5-???? No Idea why this one was missing. I went thru the list one by one and never heard it. 





VOICE 7
99441638- Spell Level 1