Local stations can generate their station broadcast logs based on a master broadcast log. In some cases, local stations are allowed to edit some positions, or slots, in their local logs, so that the local logs do not match the master log. This can create complexity when voice tracks for empty voice track slots are provided to the local stations, because voice tracks often reference the media in slots on either side of the empty voice track slots. An improved voice track editor indicates whether media items adjacent to an empty voice track slot in a master log match corresponding items in a station log.