How i can add Eva sounds for a new faction?

I try it once with only the eva.xml but it wasnt effectiv

whats the normal way to add eva sounds?

For example: New Faction gets soviet sounds

Eva sounds are described in the Mod SDK FAQ on the official forums 

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i needet a bit time, but i dant find the part about the eva sounds^^

i inculde the eva.xml in an extra folder called ModMetaData_Mod.xml
if i do, i get tons of warning and the game as no eva.
Waring: Unknown asset 'BaseAudioEventInfo:xyz

every sound is listet, what i have to do?