The Harmonizer
®
Programmer’s Manual
© 1999-2008 Eventide, Inc. Page 25 of 97 Release 1.3
After adding both modules, the screen should look similar to the
one at the right. The modules are overlapping and nothing is yet
connected. Move (by clicking and dragging) the modfilter module
to the right so that both modules are clearly in view. Note that the
DSP outputs and the head module input “move out of the way."
The screen should now look
similar to the small one at the
immediate right.
Now connect in1 > to in on the modfilter module by clicking on in1 > and then dragging to in on
the modfilter module (recall that if you “hover” the
pointer over an input or output for a second, a “bubble” will
appear that describes the input or output)
. Similarly,
• Connect low on the modfilter module to >
out1
(“low” is the lowpass output of the filter).
• Connect high on the modfilter module to
>out2 (“high” is the highpass output of the filter).
• Connect out on the LFO module to fmod on the
modfilter module. (“fmod” is a modulation input. The
filter’s cutoff frequency will vary as a function of the signal
applied to this input.)
The result should look similar to that shown right.
Let’s take a moment and analyze these connections. A signal comes into the DSP’s input 1 and then
into the modfilter module. We refer to the Modules Section of the Help System to learn what
exactly the modfilter module will do with the signal. It reads:
Modfilter:
This module implements a classic state-variable audio filter. It provides simultaneous lowpass, bandpass, highpass, and notch outputs. It has
variable Q. . . and frequency and has mod rate frequency and q factor modulation inputs.
So, not surprisingly, it will filter the signal applied to its input. All of the frequencies in the input signal
that lie below the cutoff frequency will be output at
low, and all of the frequencies in the input signal
that lie above the cutoff frequency will be output at
high. Furthermore, the LFO module’s output signal
will modulate the cutoff frequency. We’ve now satisfied “cornerstone one” of program construction:
We’ve connected appropriate modules to achieve a desired, overall audio effect.
The second and third “cornerstones” of program construction state that:
• We must control the parameters of the modules in a program so that the desired audio effect is
achieved.
• We must make some of the parameters available in the PARAMETER area so that the user can
“tweak” the program to fit a particular situation.
• In our simple program these will be one in the same. We will arrange to have the parameters for
both modules available in the
PARAMETER area by connecting their userobject outputs to the
userobject inputs of the head module.
(207 pages)
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