Optical audio basics
TOSLINK carries digital audio over light. Simple but limited.
What it supports
- Stereo PCM up to 24-bit 96kHz.
- Compressed 5.1 surround via Dolby Digital or DTS.
- Does not support lossless formats like Dolby TrueHD or DTS-HD.
When to use optical
- Soundbar without HDMI ARC support.
- Older AV receiver without HDMI inputs.
- Avoiding ground loop hum from analog connections.
When to switch to HDMI ARC
- Need lossless audio formats. Use eARC.
- Want single cable for audio and CEC control.
- Soundbar supports ARC. Simpler setup.