If you like arduino, check out the teensy. It has a really good audio library and lots of example projects related to Audio. Like you can probably do an equal

If you like arduino, check out the teensy. It has a really good audio library and lots of example projects related to Audio. Like you can probably do an equalizer in software with it. It use the Arduino IDE and library so it should be pretty straightforward. Very reasonable prices for the hardware as well. https://www.pjrc.com/teensy/td_libs_Audio.html https://www.pjrc.com/teensy/td_libs_Audio.html That will be good for getting familiar. At some point if you want to design circuits you need to learn the circuit theory and math. Too many resources to mention but if I had to pick one I'd look at something like MIT Open Courseware EE classes on circuits and "systems and signals" For books Art of Electronics is the classic.