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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 awaX from
the sustain level to tHe
minimum level after the note
has been released.
l
14
CUTOFF FREQj 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 .,,
,
1 progressively "rounder," or
less bright.
' '' · ·
1
''
1
10
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.
1
15
RESONANCE
I
!Emphasizes harmonics near
I
the cutoff frequency,
1
prqducing
'!.
peaky_~r
I
bandpass type of sol!nQ.
,,
10 tl1
,The high ~r the value, the;
higher the resonance peak
and the more obvious the
effect.
' 1 6
ENVELOPE DEPTH
l
Determines the amount of
effect that the VCF has on
the overall sound.
•, r'J
- '29-
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
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I
'------.
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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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