There seems to be a bug with the Tetra Voice-Pack for the Autochat.

In the Menu -> Gear Icon -> Chat Settings -> Auto Chat then under the Tab Actions.

In the Fields "Normal Attack" and "Photon Arts Activated" it always uses her /vo1 no matter what /vo is in there.

In the Field "Technique Activated" it always uses the /vo3 for custom damage Techs and /vo4 for custom support techs and non-custom damage techs, no matter what /vo is in there.