Tivo will automatically use the MPEG audio if there is no AC3 audio available. However, if the cable company provides a AC3 stream Tivo will use it, even if it is blank.
Cable company should not be providing a blank audio stream on AC3, they should just drop that stream.
Good luck in trying to convince your cable company that this is their problem.
Cable company should not be providing a blank audio stream on AC3, they should just drop that stream.
Good luck in trying to convince your cable company that this is their problem.