12
VCF
SUSTAIN
LEVEL
The
level to which the
sound's
VCF
envelope
decays
, assuming that the
note
is
still being played on
the keyboard.
13
VCF
RELEASE
TIME
Releas
~,fime·
is
•th'e period
that it takes for th ~
VCF
-
envelope to fall awa X from
the sustain level to tHe
minimum level after the note
has
been released.
l
14
CUTOFF
FREQ
j
ENCY
Determines the cutoff
frequency
of
the low-pass
' filter. u • '
1,,,1~,,
I
The
higher the cutoff r"'
'"),
frequency, the
less
effect the
filters have on the basic
waveforms
(as
more
harmonics are
passed).
At
the highest value, all
harmonics are
passed
.
As
the
value becomes lower, more
harmonics are cut
off
so
that
,
·t>\.n
I
1
the sound b~comes
.,,
,
1progressively
"rounder
," or
less
bright. '
''
· ·
1
''
1
10
I .
1
15
RESONANCE
I
!
Emphasizes
harmonics near
I
the cutoff frequency,
1
pr
qducing
'!.
peak
y_
~r
I
bandpass
type
of
sol!nQ.
,,
10
tl1
,
The
high ~r the value, the;
higher the resonance peak
and
the
mor
e obvious the
effect.
'
16
ENVELOPE
DEPTH
l
Determines the amount
of
effect that the
VCF
has
on
the overall sound.
•,
r'J
-
'2
9-
Sound Synthesis Techniques
Level
Sustain
/eve/
t
Time
Key
OFF
L ,
,ol•J
I
J,
. ,
Level
,,
I
Level
!I •
Level
Level
n,
Re/ease
time
I I
1-------J
I I
'------.
I
I
I
t
Time
Key
OFF
Harmonics
Cut
off
f Frequency
Cut off harmonics
rl
~,
)j
:iJ'
fl,
.
I
Emphasized
I
Cut
off point
t
Envelope
depth
Key
ON
Time
Key
OFF
I
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