Order of operations when a real audio signal becomes complex

1. What are the 2 types of audio signal?
2. How do audio signals work?

What are the 2 types of audio signal?

An audio signal is a representation of sound, typically using either a changing level of electrical voltage for analog signals, or a series of binary numbers for digital signals.

How do audio signals work?

Audio signals are the representation of sound, which is in the form of digital and analog signals. Their frequencies range between 20 to 20,000 Hz, and this is the lower and upper limit of our ears. Analog signals occur in electrical signals, while digital signals occur in binary representations.