Book Image

Multimedia Programming with Pure Data

By : Bryan, Wai-ching CHUNG
Book Image

Multimedia Programming with Pure Data

By: Bryan, Wai-ching CHUNG

Overview of this book

Preparing interactive displays, creating computer games, and conducting audio-visual performance are now achievable without typing lines of code. With Pure Data, a graphical programming environment, creating interactive multimedia applications is just visually connecting graphical icons together. It is straightforward, intuitive, and effective. "Multimedia Programming with Pure Data" will show you how to create interactive multimedia applications. You will learn how to author various digital media, such as images, animations, audio, and videos together to form a coherent title. From simple to sophisticated interaction techniques, you will learn to apply these techniques in your practical multimedia projects. You start from making 2D and 3D computer graphics and proceed to animation, multimedia presentation, interface design, and more sophisticated computer vision applications with interactivity. With Pure Data and GEM, you will learn to produce animations with 2D digital imagery, 3D modelling, and particle systems. You can also design graphical interfaces, and use live video for motion tracking applications. Furthermore, you will learn Audio signal processing, which forms the key aspect to multimedia content creation. Last but not least, Network programming using Pure Data extension libraries explores applications to other portable devices.
Table of Contents (17 chapters)
Multimedia Programming with Pure Data
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Generating audio with waves


The last section mainly uses prerecorded sound for playback. We can generate original sound from Pure Data itself. We hear sound from our computers because the speakers transmit sound waves through the air. In Pure Data, we can create a sound wave with audio objects. The digital sound wave will play through the digital-to-analog converter and become the analog vibration of the speaker membranes.

In Pure Data, we create simple waveforms, such as sine wave and sawtooth wave. We shall see the waveform displays in the following patches. When we hear a piece of sound, we identify three properties: the first one is the loudness or amplitude, the second one is the pitch or frequency, and the third one is the quality or timbre. The first two properties are easy to understand. Acoustic musical instruments or our voice usually do not contain only one frequency. A note usually contains a number of different frequencies with different amplitude. They are the overtones. Usually...