First of all, what is a synthesizer?

 

When you pluck a guitar string, it vibrates, and those oscillations travel through the air to the eardrum. Synthesizers mimic this process through its electrical components. Voltage-controlled oscillators produce a waveform which is then manipulated by the synth's controls like the LFO or Envelope Generator to change pitch, tone and timbre. The sound is amplified and sent through a speaker.