4 channel USB audio interface

Hi, looking for a reasonable USB interface to allow me to have the 4 playout carts in mAirlist to feed 4 seperate faders on the mixer desk. Any ideas or recommendations?

Hi,
I have successfully used 3 Behringer UCA202/UCA222 usb devices. These have been plugged into a USB 3 hub. I can see no reason why a forth would not work.
I have also taken the sound output from the PC’s motherboard to use as PFL. Once any device has been installed on the PC then Mairlist spots it in the Audio of the Configuration menu.
Note PLF/Cue through a separate sound device is totally separate from players with their own sound cards, and the faders on the mixer can be left open without any sound when using the PFL/cue icons.
The PC output could be used for the carts instead, but this depends on the quality of the sound card in the PC.