As the subject says all channels have sound through the soundbar except the movie channels. I have the optical into the tivo and soundbar and the hdmi into the TV in port 1 ARC
try changing the audio settings on the TiVo box. There are only two options to choose from.
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Can you connect your TV directly to the TiVo with a TOSLINK and HDMI cable (non-ARC port). Do you get a problem with either?
Is there an alternative TOSLINK cable you can try?
Sorted ty guys . All good...