DAR - Digital Audio and Recording (Overview)

 

Overview

Introduction

Sound is everywhere! We can’t see it, but it is all around us. Car horns, school bells ringing, and a dog barking all fit the description of sound. How is sound generated? Sound is generated when an object vibrates and produces sound waves that go into our ears and these vibrations change into signals that get translated by our brain. With computers and other audio devices today, these vibrations can be recreated and stored allowing us to be able to hear any sound whenever and as often as we would like. In this module, you will learn how to successfully create audio files.

Essential Questions

• How can sound be captured?
• How is audio used or incorporated by businesses today?
• What is the best audio file type to choose for your project?

Key Terms

• Analog Audio: An audio wave recorded or used in its original form with the signals stored as a continuous signal.
• Codec: A piece of hardware or software used to make it easy to transfer large data files through compression techniques.
• Digital Audio: Refers to technology that records, stores, and reproduces sound by encoding an audio signal in digital form instead of analog form.
• Lossless Audio: A compression technique that decompresses audio files back to their original data amount.
• Lossy Audio: A compression technique that does not decompress audio files to their original data amount. Lossy methods provide high degrees of digital compression, which results in smaller files.
• Sound Recording: The reproduction of sound waves into a fixed form from which the contents can be heard or communicated again.
• Uncompressed Audio: An audio file that has no compression applied to it.

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