If an audio track has no currently active output (main or send), it won't be allocated a voice and its associated voice field will be grayed out to indicate no voice is assigned (correct behavior).However, the text "- free voices n/a" is appended to its voice number in the voice popup which is incorrect (and misleading). The track did not get allocated a voice because Pro Tools is out of voices but rather because the track didn't need a voice because it has no active outputs.