Casio Casiotone 1000P Operation Manual page 15

Casiotone 1000P Sound Creation System)
The Casiotone I000P sound programming function allows the creation of 1000 different
sound characteristics by combining FEET, ENVELOPE and MODULATION, which are
important sound determining elements. The following is a simple explanation of these three
elements.
FEET
The lengths of pipes in a pipe organ are normally expressed in terms of feet and these are used
as units to express the harmonic numbers which determine sounds. Sounds are varied by
combining feet such as 8', 4', 5 I /3', etc. The Casiotone 1000P has 10 combinations assembled
in advance (such as "8'-4', etc.), and the sound name is shown in parentheses. Since the rela­
tionship between the harmonics and the sounds require a rather specialized theory, all that is
required to be understood here is that feet are elements which determine the sound. Further­
more, among the 10 elements of FEET, since CHIME (2 2/3'-I 3/5'-1 1/3') does not include
whole number harmonics, it cannot be heard as the sound of a musical interval. So please
use it as a sound effect.
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envelope
Envelope is normally defined as the "excess characteristic". However, it might be more easily
defined as the variation in the sound intensity from the moment the sound is produced until
it is gone. The envelope differs according to the musical instrument. For example, with a
violin the envelope gradually becomes higher, whereas a guitar sound reches its peak the
moment the string is plucked and then drops. When the envelope is different, even if the basic
sound is the same, a different effect will be heard. For example, if the envelope of strings
( ) is applied to the Flute sound, it will sound similar to that of a harp.
The Casiotone 1000P has 10 kinds of envelope already set and each has an envelope curve*
as shown on the Sound Characteristic Data Chart.
Envelope Curve:
The volume variation over a specific period of time is
graphically represented as shown in the figure and this
is called the "envelope curve". These graphic representa­
tions are located on the Sound Characteristic Data Chart
on the Casiotone 1000P.
MODULATION
Modulation means a creative sound effect obtained by modulating the frequency or amplitude
like the Wah or Treble effects. The Casiotone 1000P has 1 0 kinds of modulation already set as
shown on the Sound Characteristic Data Chart.
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