There are TF card sockets, SD card sockets, U disk sockets and so on.
Some speakers also have devices such as music high-middle bass adjustment and microphone high-middle bass adjustment;
It is possible to connect the electric guitar directly to the computer host, but there is a very important problem, that is, the interference sound. Because the host is a device directly connected to AC 220V, the voltage stabilization performance can't be compared with DC, so there will be serious AC interference at the output. It is best to install anti-interference filtering device in front of the host computer or use a notebook computer to work in the form of battery power supply.