It doesn‘t always have to be a RPi, sometimes there is dedicated hardware for that use case that is also kinda cheap. Check this thing out, it‘s a programmable

It doesn‘t always have to be a RPi, sometimes there is dedicated hardware for that use case that is also kinda cheap. Check this thing out, it‘s a programmable audio DSP: https://www.thomannmusic.ch/the_t.racks_dsp_4x4_mini.htm https://www.thomannmusic.ch/the_t.racks_dsp_4x4_mini.htm