Breaking in a new Sony 4k blu ray player. Running this into a Samsung 4k TV.

I have an issue with sound being out of sync when sending the sound to my amp via co-axial, in that the sound is marginally (and annoyingly) in front of the visuals.

No problem with sending via the optical cable that runs between the TV and the amp, but I've always preferred the quality of a co-axial.

The TV does have an option to offset the sound, but this hasn't helped.

Any ideas? Do I need to upgrade the optical cable to get closer to the quality of the city-axial, maybe?

The blu ray player does have dedicated HDMI output for sound, bug my amp doesn't have an HDMI input. I assume I could upgrade to a new amp which I'd thusly equipped, but that seems like using a sledgehammer to crack a peanut.

Any suggestions welcomed.