Lesson 3: Basic Electronics

Live sound and audio has been dependent on electricity for a very long time. Let’s look at the fundamentals of electricity and the evolution of technological advances that have shaped the audio world and made live sound what it is today. Ever stop to think about what is happening when you flip on a light switch? Many years of discovery and technological advances went into making that light switch possible! You might ask, “But what does this have to do with audio?” The answer is A LOT! In this chapter we will take a very basic look at some of the fundamentals of electricity and how these concepts apply to the audio world. An electronic circuit is a device that provides a path for electrons to flow. This usually starts with a source of voltage. Named after the scientist Alessandro Volta, a single volt is a unit of measurement similar to a decibel. It is not an absolute value, but rather the measurement of the difference in electrical potential. Luckily, people who specialize in these fields of study have figured all this stuff out! All you need to know for now is that voltage is a measure of electromotive force.