Probably the easiest way is to get several cheap MP3 players, and some small speakers and just play your sounds on a loop.

I found these with a quick search. I might get some for my outdoor halloween display this year...

https://smile.amazon.com/Yosoo-Pillow-Speaker-Stereo-Portable/dp/B07GJPL8Q8/

https://smile.amazon.com/AGPTEK-Shuffle-Portable-Sweatproof-Silicone/dp/B0722KVJM3