Jomox T-RACKONIZER Operating Manual
T-RACKONIZER
EURO RACK FILTER MATRIX MODULE
Operating Manual
Thank you for using the Jomox T-Rackonizer! We hope that you will enjoy
this unique device and have lots of fun with it.
The T-Rackonizer is the eurorack successor of our very sucessful TResonator which did very well over the past years. It has been the least
possible implementation of the former experimental filter network
synthesizer called „Resonator Neuronium“. The number of 6 nodes had
been reduced to only two filter nodes – but still this structure offers a
tremendous variety of sounds.
The module contains 2 analog T-ladder moog-like filters and a digital delay.
“T“ stands for “Time“.
“The T-Rackonizer transforms timely events into an analog filter feedback
network.“
● What does that mean? The T-Rackonizer is a stereo filter made with
analog circuits and capable of feedback, with an integrated stereo digital
delay. The digital delay, which features analog feedback loops, is literally
“woven” into the circuits.
● The stereo filter contains every possible internal feedback path, all
controlled using the Feedback and Mix 1/2 controls, with a dedicated knob
for each of them.
● The filters are two 4-pole, 24 dB/octave transistor ladders made entirely
from discrete parts.
● On the T-Rackonizer, the mix, feedback and cutoff controls can be CVcontrolled (CV = control voltage). Once you insert a CV cable into the CV
jacks, the corresponding internal control knob (e. g. Cutoff) acts as an
amount to the external CV. Without CV input, the control knobs work over
the full internal range.
On the mid-zeroed controls a voltage of 2.5 V represents the center
position. This only yields if the amount (= the corresponding control knob)
is fully turned clockwise.
● 8 different chorus/delay/reverb algorithms can be chosen for the delay
section, which includes 2 independent delay lines with different delay times
and feedbacks. The delay times extend from less than 1ms to 1 second,
the actual range and structure depending on the chosen algorithm.
● Also the program select can be CV-controlled. The control voltage is
added to the internal selection. If the range exceeds number 8, it rolls over
to program 1.
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● Moreover, the T-Rackonizer contains a sine wave LFO that can run on its
own or be shaped by the audio envelope. All aspects of the LFO are
controlled by a single knob. In the center position the amount is zero,
turning to the left controls audio-enveloped LFO, and turning to the right
controls LFO running freely.
● The sine LFO gets retriggered by the audio signal depending on the input
gain. The envelope is generated by an audio envelope follower, and the
LFO and envelope can be combined.
● Extremely versatile modulations are possible with this unique structure.
● The delay feedback routes back from the outputs of the analog filters into
the analog inputs of the delay line.
● You can easily create seesaw analog echoes, “Klingon”alien insect voices
using extreme feedback or membrane-like sounds by “wave guide”
algorithm and many more.
● Because the feedback audio is analog, the resulting audio sounds very
organic. The screaming analog feedback can repeat itself via delay and
create new sound patterns by layering.
Caution: On some settings of filter feedback, extremely loud and powerful
bass signals or feedback sounds may occur that can damage your speakers
or ears! If you are not familiar with the device, please consider using a
limiting device or a lower mixing level!!
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Installation
Please turn off the euro rack prior to the installation! On the backside of
the T-Rackonizer module you can find these connections:
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Installation in the eurorack
Please connect the supplied ribbon cable to the eurorack system bus rails
as shown on the pictures. The module needs +/-12 Volts at a supply
current of maximum 130mA on +12V and about 70mA on -12 Volts. The
optional 5 Volts and the CV/Gate on the A-100 Doepfer bus are both not
wired inside the Jomox module and not needed.
Other 10 pin systems may be used as well if only the lower part of the 16
pin connector is connected.
Please pay attention for the position of the voltages and the ground pins!
The printed voltages must match, please check the wires again and
make sure no pin is left or bent.
There are protection diodes inside the modules but please take extra care
to protect the rack and the module!
A-100 Doepfer bus. (The
Doepfer GmbH
enterprise and all of
their shown products are
registered trademarks.
With friendly approval of
Doepfer Musikelektronik
GmbH)
Jomox T-Rackonizer euro rack supply connector. Please connect the power
supply of the eurorack system bus here.
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Attention: DO NOT connect, under any circumstances, the power
supply cable to the Jomox Inter-D-module bus!!! The rack power
supply and the module could get seriously damadged!
Then please mount the module on the rack rails using the supplied metric
M3 screws.
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Audio inputs:
Please connect the audio signals to be processed here.
The T-Rackonizer has Hi-Z (high impedance) unbalanced inputs, allowing
you to plug in an instrument like an electric guitar or a bass directly
without any loss in sound. The gain reserve is enough to amplify a weak
guitar signal to drive the filters. Unbalanced line audio signals of almost
any level can also be processed.
Audio outputs:
The output signals of both filters are split out here.
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+
-
+
-
L
R
IN L
IN R
FX PROC
L
R
OUT R
OUT L
ENV
LFO
CUT
+
-
-
+
-
+
-
+
-
+
-
FEEDB MIX 2>1
FEEDB
MIX 1>2
DELAY IN
DELAY IN
CUT
+
-
CUTOFF
ENV AMT
ENV AMT
CUTOFF
PROG 1-8P1 P2
DELAY FEEDB
DELAY FEEDB
CV
CV CV
CV
CV
CV
CV
INT
RATE
FILTER
FILTER
T-RACKONIZER BLOCK DIAGRAM
GAIN
GAIN
IN OUT
User Interface Analog Section
Gain:
This adjusts the sensivity of the input. If the signal overloads the input, all
8 LEDs of the program selection will light up. However, the unit has
considerable headroom and is quite resistive to overloading. You can
(ab)use the distortion of filters creatively without having to fear that the TRackonizer will be damaged.
LFO Intensity:
Controls the intensity of the LFO/envelope signal. At center position, the
intensity is zero. When you turn to the left, the resulting modulation signal
is a combination of audio envelope and LFO. The envelope masks the LFO.
So, the signal is dependent on the input signal and the LFO.
E n v +L F O
E n v e lo pe
Turning to the right controls the LFO running freely on its own, fully
independent of the audio signal.
L F O
The sine LFO wave is re-triggered by peaks in the audio signal. The
threshold itself is fixed, but it can be varied by the adjustment of the Gain
control.
LF O
A U D I O
R e st ar t
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LFO Rate:
This parameter controls the LFO frequency (period) and ranges from
approximately 0.15Hz (7sec) to about 22Hz (45ms).
If the LFO Rate is set very low and the LFO Intensity is turned to the left,
the envelope alone determines the resulting modulation signal, so it is
possible to seamlessly adjust between a pure envelope signal and an LFOmodulated envelope signal.
L F O R a te s m a l l
E n v e lo pe
L FO R a te = 0
E n v e lo pe
Env Amt 1:
This knob determines how the envelope signal modulates the cutoff
frequency of the left filter (Envelope Amount). In the center position, the
cutoff of the filter is not changed. As you turn it to the right, the filter
cutoff opens further, and the corresponding right LED lights up. If you turn
it to the left, the filter gets closed in the rhythm of the envelope signal, and
the left LED lights up.
The LEDs show the phase of the modulating signal. If LFO intensity and
Env Amount are set to high levels, both LEDs may light up alternating on
sine LFO. They light up in the rhythm of the phase of the modulation
signal.
Env Amt 2:
This operates exactly like Env Amt 1, but affects only the cutoff frequency
of the right filter.
Mix 2-1:
With this knob, you can mix the output signal of the right filter with
positive or negative phase into the left filter. At center position the
intensity is zero. Turning to the left increases the negative phase
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feedback, and turning to the right increases the positive phase feedback.
Depending on the other parameters, even small deviations from the
midpoint may lead to rather extreme changes of sound.
Mix 1-2:
This operates exactly like Mix 2-1, but with this knob, you can mix the
output signal of the left filter with positive or negative phase into the right
filter.
The two Mix knobs can bring some interesting results. When Mix 1-2 and
Mix 2-1 are turned in opposite directions, the outputs will be out of phase
with each other, resulting in very narrow band screaming filters! On the
other hand, setting the two knobs similarly will create strong bass
enhancements via phase doubling.
Experiment and have fun!
Cutoff:
These knobs change the corner frequency of both low pass filters. The
more either knob is turned to the left, the duller its signal will become (as
the high frequencies get filtered). The more either knob is turned to the
right, the more its filter will open up, and its signal will become brighter.
However, other parameters may also affect the cutoff, for example
envelope amount. With the cutoff controls, you are just setting the basic
value on which the other modulations add or subtract.
Feedback:
At center position there is no feedback. Turning to the right resembles the
typical resonance of a normal music filter. If you turn it to the left though,
the filter reaches a fairly unstable state by positive feedback. Vibrations
appear that are similar to LFOs, and in extreme positions very low bass
tones can result.
Caution: On some settings of filter feedback, extremely loud and powerful
bass signals or feedback sounds may occur that can damage your speakers
or ears! If you are not familiar with the device, please consider using a
limiting device or a lower mixing level!!
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