9

Table Of Contents
If you are new to synthesizers, read this appendix.
This appendix covers important facts about the synthesizer and explains the difference
between analog, digital, and virtual analog synthesizers. You will be introduced to all
major synthesizer terms and will learn about the basic workings of these hardware- or
software-based devices. This appendix is not a detailed, scientific treatise on the inner
workings and mathematical theories of synthesis. It is a simple guide to what you need
to know, including some extras that are nice to know.
Take your time to read through the appendix as it’s laid out, and feel free to experiment
with the ES1, ES2, and other Logic Express instruments. Seeing and using the parameters
and other elements onscreen will help you to better understand the conceptual and
practical aspects of synthesizers.
Prior to considering any of the sound-generating components you will find in a synthesizer,
it’s important that you understand sound itself.
This appendix covers the following:
Sound Basics (p. 347)
What Is a Synthesizer? (p. 351)
How Subtractive Synthesizers Work (p. 353)
Other Synthesis Methods (p. 367)
A Brief History of the Synthesizer (p. 371)
Sound Basics
Technically, sound is the conversion of physical energy—such as a hand clap—to an air
pressure disturbance. This change in air pressure is transmitted as a series of vibrations—a
sound wave—through the air. Sound vibrations can also be transmitted through other
matter, such as a wall or floor.
347
Synthesizer Basics
Appendix