“I bought a number of these for a project where I need two separate audio channels to play simultanously using mpg123 on my Pi Zero. I wasn't convinced that it would work, but it does and the quality is perfectly adequate for what I need.
It isn't quite plug and play because each device has to be identified in the list of all USB devices, but once that is done, it works fine.”
“Giving 3 stars only. The red led is irritating and sound quality is not so good (compared to integrated sound card on the motherboard of my desktop).”