Depends on what you are connecting to on each side of the converter and what you want to put through it (what type of audio content) and the resulting experience you want to get. In other words, ...

You get the same nostalgic rush replaying retro games, armed with old tricks. Most TVs still have RF or AV/RCA ports; use RCA ...

I have an older Panasonic TC P50ST30 (release review/specs here) that was generously given to be by another Arsian that does have ARC support (I think). The TV sitting in front of an old but nicer ...

HDMI is the norm for a lot of devices these days, but there are times when you need something more than HDMI. Whether you need to connect to RCA or Optical (SPDIF) or even just headphones, an audio ...

HDMI 2.1 connections are key for high-quality audio and video. 3.5mm offers basic audio; optical handles DTS/Dolby; eARC provides the highest quality sound. USB ports support charging, file access, ...