Advertisement
^fcDiljif
ENVELOPE
i^^'a-T-li.
8rfr#ft-?tt4
&
L«>
v
ma.
•Ci-o
Fe*\
EXPAND
??0).&&t:
J:
->TW(
•
Envelope
An
envelope
is
the
volume
contour of
the
sound;
it
is
the
shape of
the
sound
as
its
volume
changes over
time.
This envelope
can be
divided
into
sections
called attack,
sustain,
and
decay.
Figures
41~
-
44 show
the
envelopes
pro-
duced by
some
common
instruments
and
the
KM
settings
used
to
synthesize
them.
Think
of
these
examples
as
standards
from
which
the
envelope
may
vary
depending
on
the
settings
of other
controls such
as
Fc
and
EXPAND.
o
>
Susta
in
Leve
ON
Key
OFF
ATTACK
:
DECAY
:
SUSTAIN
:
10
R
•
SW
:
D
£
ON
'
i\ey
-
ATTACK
C
:
0-5
DECAY
:
0-5
SUSTAIN
:
5-10
R-SW
:
:
HD
OFF
ATTACK
DECAY
SUSTAIN
R-SW
OFF
3-6
5-10
HD
OFF
ATTACK
DECAY
SUSTAIN
R-
SW
4-7
0~(}g^#)
Time
sustained)
HDorR
(£«£)
(As
appropr
iate)
fig.
41 Organ
(#/U#>
•
\-
—
>)
fig.42
Brass
(**»»)
fig.
43
Str.ngs
(*
h
*)>?&)
fig.
44
Plucked
or
percussive
(&&&)
Advertisement
