What To Do If Your Optical Audio Cable Connection Is Not Working If you've adjusted your TV's sound settings but still don't hear sound coming from your soundbar or speakers, there are some ways ...

all 2 channel optical is the same, toslink, s/pdif...the only other common-ish optical format would be ADAT (uses same kind of optical cable as toslink spdif, just has 8 channels of audio in and out).

The Ser2 was hooked via S-video and L/R audio to one of the Video inputs of the Sony TV, and the TV's Optical Audio Out was hooked to the Sony Receiver. This had worked fine for several years.

This can provide a direct S/PDIF output from your PC. Avoid Analog Conversions: Avoid using analog to digital conversions (e.g., 3.5mm to RCA to Optical) as they can degrade audio quality.