External Soundboard?

I run a little gaming server where we do story-based community events with some light RP. For this purpose it would be great to have a device that can store, play (and maybe even loop) audio files and connects to my little Yamaha AG03. It would be great if I could connect it to my PC via USB, too.

Unfortunately I don't have my little MP3 player anymore, which I could use. So I'm looking for something like a Steam Deck, but for audio only.

(Hope this community is right, the others seemed too specific in topic)