PP probably refers to those very cheap USB soundcards, usually shaped like a dongle, with two mini jacks, sold pretty much everywhere. I tried a couple in the past (can't confirm if the chipset is the same) and they definitely sound better than expected from a device that cheap, however be aware that manufacturers often save on parts number or quality to reduce costs therefore it can be a hit and miss, with some of them making noises or offering inferior quality.

A few I would make about this:

* USB soundcards used to work on Android but in recent tests they failed again for some reason

* Avoid any dongle that supports "special effects", "gaming", etc. Even if they can be disabled, it's such a pain.

* Dynamically adding/removing soundcards can affect your computer's notion of "default microphone", particularly relevant for video chat. Some apps this takes effect immediately, some after quitting the app.