So, I recently bought a mixing board and a powered PA speaker. I downloaded the manual for the board and it shows in the manual that you can plug in (in their example it’s a reel to reel tape recorder) some sort of recording device. I circled it in red in the pic

I’m wondering if there is some modern piece of recording equipment, preferably mp3, that I could hook up in line. Like: board>recorder>out to speaker so we can play live and record it. Something that has 1/4 inch TRS jacks in/out.

I don’t know a ton about this stuff and I know I can get a stand alone tascam style recorder, but surely this sort of thing exists, since it used to with older technology?