How does it sound now?
If it has a gourd loop hum, then optical is a sensible option... but it will not likely change between optical, USB etc unless there is a glaring problem.
Is digital optical audio worth it?
I'm using a Samsung HW-F355 sound bar for my computer audio.
Right now it is plugged in through a regular aux cord. I noticed it has a digital optical audio input jack. I'm using my computer's motherboard's default audio output, which doesn't have optical.
Would it be worth it to buy a sound card for my computer to connect it to the sound bar via digital optical audio?
I'm not really an audiophile so it doesn't matter much, but if there would be any noticeable improvement I would do it just as a computer upgrade.