Hanging on the body like an electronic organ, playing keytar is not a single instrument, but an evolutionary form of synthesizer.

If you want to teach yourself, you need to learn and be familiar with keyboard instruments, such as synthesizer, piano, organ and so on. Then it is how to debug the timbre of digital synthesizer, and carry out superposition sorting including the principle of analog synthesizer.

The early shoulder keyboard is the evolution of midi keyboard. The midi keyboard is sent to the sound source equipment through midi signal line, and the sound source equipment can only generate sound by transmitting it to the monitoring equipment through audio signals. This is the early design concept and the working principle of ordinary midi keyboard.