The 184.108.40.206 ballot station is hard coded to VIBS. The next release will recognize VIBS flagged voter cards. Voted cards will be rejected as pre usual, without playing audio.
There is no such thing as a "voted VIBS voter card". That concept does not make sense: the previous voter who voted the card may or may not have been visually impaired.
We could play some audio unconditionally for rejected cards. If the headphones are not plugged in, that would mean everyone in the vote center would hear the message. I am not sure whether that is a win. Comments? I guess it would play the error in English (like the onscreen message) whether the voter understood English or not. 'Course we could ask to voter to select their language before rejecting the card. Hmmm....