Rocktron Prophesy II - Manual (Page 77)

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13 Use the TREBLE control to set the S-TIME (Sustain Time) parameter,
or the length of time in which the WAH FRQ parameter will hold the
value set by the S-LVL parameter.
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14 Use the PRESENCE control to set the S-LVL (Sustain Level) param-
eter, which defines the value that the WAH FRQ parameter will hold at
for the length of time defined by S-TIME .
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15 Use the MASTER control to set the R-TIME (Release Time) param-
eter, which defines the length of time (in milliseconds) for the WAH
FRQ parameter to go from the S-LVL value back to its minimum value
after S-TIME has expired.
That's it! You now have a dynamic, automatic wah pedal effect which simulates pressing and
releasing a wah pedal with every picked note. This is far more effective than a conventional
automatic wah effect, which simply varies the wah frequency up and down based on time (without
recognizing what is actually played). In fact, for many applications using ADSR with the wah effect
can be even more accurate than using an actual wah pedal.
Figure 7-2 shows a graph similar to that shown in Figure 7-1, but with the parameter values
from this example included.
ADSR
ON
ATTACK
19
DEC
53
S-TIME
14
S-LVL
61
R-TIME
12
ADSR
ON
ATTACK
19
DEC
53
S-TIME
14
S-LVL
61
R-TIME
0
ADSR
ON
ATTACK
19
DEC
53
S-TIME
14
S-LVL
0
R-TIME
0