Rocktron Prophesy II - Manual (Page 78)

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Figure 7-2: Graphical representation of example settings
What happens when a note is plucked?
 Referring to Figure 7-2, upon the pluck of a string, the WAH
FREQ parameter starts at its lower limit value of 2600Hz and
gradually increases to its upper limit value of 310Hz (remem-
ber, the upper and lower limits have been reversed in this
example) over a period of 19 milliseconds.
‚ The signal then decays from the upper limit value (310Hz) to
the value set by the S-LVL parameter over a period of 53ms.
ƒ The WAH FREQ parameter will hold at the current value for 14
ms, as defined by the S-TIME parameter.
„ After S-TIME has passed, the WAH FREQ parameter will drop
to the value set by the lower limit parameter (2600Hz) over a
period of 12ms.
Note that changing the value of the WAH FREQ parameter as described above is essentially the
same process that occurs when a conventional wah pedal is pressed and released over a period of
98ms (the total time-span shown in Figure 7-2).
Viewing the ADSR effect as it operates
It is possible to actually view the ADSR effect in action by viewing the parameter that the
ADSR is controlling. After completing the setup steps, press the WAH button to recall the Wah page
and you'll actually be able to see the WAH FREQ parameter being adjusted by the ADSR as you
pluck notes! This is also a handy way to identify the actual parameter value that the ADSR's S-LVL
(sustain level) parameter represents. In this example, you'll notice that after the decay, the wah
frequency parameter will stop and hold for 14 milliseconds (S-TIME) at 1297HZ (S-LVL).