The Raspberry Pi has an on-board audio jack, which is super handy for all kinds of sound effects and speech, just plug and go! However, for when you want better audio for music playback, a USB audio card can greatly improve the sound quality and volume. That's because the on-board audio is generated by a PWM output and is minimally filtered. Don't get us wrong, it's a great thing to have audio on board but this USB audio card will make it even better.
We like this particular dongle for not being too bulky, you can plug it in without blocking the secondary USB port. It also works great with a Raspberry Pi! We've tested it successfully with the Raspberry Pi OS (other operating systems untested). The input is a basic mono line in.
The adapter has a red LED that blinks slowly when in use - that might be a tad annoying if it's underneath a TV or similar, so please consider where you're going to position this before buying.
This device also works great with Windows machines and should also function for Macs, but we are carrying it specifically for Pi usage.