Audio signals are representations of sound that can be captured, transmitted, and reproduced. They are typically created by converting sound waves into electrical signals using microphones. These signals can then be processed, amplified, and sent through speakers to recreate the original sound. Audio signals can be analog or digital. Analog signals are continuous waves that vary in amplitude and frequency, while digital signals are discrete samples of sound taken at specific intervals. Both types are essential in various applications, including music production, telecommunications, and broadcasting, allowing for effective communication and entertainment.