Compute's_Beginners_Guide_to_C64_Sound.pdf

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COMPUTE!'s
Beginner's Guide to
COMMODORE
John Heilborn
How to create music and sound on your
Commodore 64. Includes dozens of type-in-
and-run sound effects and two sound editors.
$12.95
A COMPUTE! Books Publication
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COMPUTE!'s
Beginner's Guide to
COMMODORE
n
64
SOUND
John Heilborn
COMPUTE"Publicatiorclnc©
OneoftheABCPublishingCompanies
y^^
Greensboro, Nortn Carolina
Commodore 64 isatrademark ofCommodore ElectronicsLimited.
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Copyright 1984, COMPUTE! Publications, Inc. All rights reserved.
Reproduction or translation of any part of this work beyond that permitted by Sec
tions 107 and 108 of the United States Copyright Act without the permission of the
copyright owner is unlawful.
Printed in the United States of America
ISBN 0-942386-54-X
10 987654321
COMPUTE! Publications, Inc., Post Office Box 5406, Greensboro, NC 27403, (919)
275-9809, is one of the ABC Publishing Companies, and is not associated with any
manufacturer of personal computers. Commodore 64 is a trademark of Commodore
Electronics Limited.
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Contents
Foreword
v
Introduction
vii
Chapter 1: SID: The Sound Interface Device
1
Keeping Registers Under Control
4
Making a Sound
9
Volume Adjustments
21
Changing the ADSR
24
Waveforms
27
Getting Fancy
33
Chapter 2: Music and the Sound Editor
37
Playing Notes
40
Timing and Rhythm
41
Pausing Techniques
43
Tools to Put the Music Together
46
A Simple Sound Editor
48
Using the Editor
59
Harmony and Disharmony
63
A Multivoice Chord Editor
69
Chapter 3: Sound Effects
83
Hard Sounds
85
Hard Sounds Using Pulse Waves
89
Hard Sounds Using Sawtooth Waves
97
Hard Sounds Using Triangle Waves
101
Hard Sounds That Use the Noise Waveform
102
Mixing Waveforms
105
Soft Sounds
106
Soft Pulse Sounds
110
Soft Sawtooth Sounds
112
Soft Triangle Sounds
114
Soft Noise
115
Tapered Sounds
117
Tapered Pulse Waveforms
119
Tapered Triangle Waves
122
Tapered Sawtooth Sounds
123
Tapered Noise
124
More Advanced Sound Techniques
125
iii
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