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Timber
dual waveform lumberjack
Timber is a very flexible wave shaping module that can produce
rich timbres by adding harmonics to simple waveforms (triangle
and sine waves) or any other signal. It has 2 different unique
wave shaping circuits – I. the WAVE DRIVER (left side of the
module) and II. the WAVE FOLDER (right side) – and a voltage
controlled crossfader to fade between the different circuits
or between one of them and the clean input signal.
Both circuits share the same control voltages: SHAPE sets
the input amplification before the wave shaping circuit and
SYMMETRY control adds voltage offset to the input signal to
provide various asymmetric overdrives or wave folding sounds.
There is also a FBK CV jack which, when provided with positive
voltages, feeds respective portions of the output signal back to
the input which results in chaotic and aggressive behaviours.
It is calibrated to work well with 5V gate voltages.
I. - The WAVE DRIVER
is an overdrive circuit with one folding stage and it has two
3-way configuration switches (9 different configurations). The
DRIVE switch can set the overdrive character to SOFT or HARD
or something in between. The FOLD switch can set the folding
threshold to HI or LO or it can turn the folding stage off in the
NO position.
II. - The WAVE FOLDER
is a novel take on the Serge style wave folding circuit which
cleverly uses the high gain of the input amplification stage to
provide rich high frequency timbres with higher settings of the
SHAPE parameter. It has a configuration switch to access clean
4 stage wavefolding in the OK position or highly asymmetric
folding stage in the KO position that provides a strange metallic
character. The NO position provides only the very last overdrive-
folding stage.
Voltage controlled crossfader X-FADE is present to provide
blending between different wave-shaping circuits or to work
as a dry/wet kind of control. With complex waveshaping, the
fundamental bass frequencies get often transformed into higher
harmonics and therefore it is useful to be able to mix in a bit
of the original signal.
features
� I. WAVE DRIVER is an overdrive circuit with one folding stage.
� 3-way DRIVE SWITCH to set the character of the
overdrive (SOFT-MID-HARD)
� 3-way FOLD SWITCH to configure the folding threshold
level (LO-NO-HI)
� independent output I. OUT
� II. WAVE FOLDER is a 4 stage wavefolding circuit
� 3-way FOLD SWITCH to set the character of the folding
stages (OK-NO-KO)
� independent output II. OUT
� common INPUT for both circuits
� SHAPE sets input amplification before the signal enters
the waveshaping stages
� SYMMETRY adds voltage offset to the input signal
� SYMMETRY becomes a bipolar attenuator when the jack
is connected
� X-FADE voltage-controlled crossfader with a bipolar
attenuator
� switch to select between INPUT and I. WAVE DRIVER
for the left side of the X-FADE
� X-FADE IN jack breaks the normalisation of the II. WAVE
FOLDER on the right side of the X-FADE
� voltage at the FBK CV jack sends signal from the output
or II. WAVE FOLDER back to the INPUT
technical details
� 7HP
� PTC fuse and diode protected 10-pin power connector
� 24mm deep
� current consumption: +12V: <50mA, -12V: <50 mA
application note
Different types of source signals work best with different
kinds of wave shaping. Simple waveforms sound great with
more harmonic content added and therefore using the wave
folding in either stage gives strong results. Complex signals
such as acoustic instruments or drums already have a lot of
higher harmonics which when multiplied by folding stages
can become quite noisy. Therefore, for such signals, more
pleasing results may be obtained by applying overdrive rather
than folding. There are no written rules for this process and
ultimately the best techniques are those that sound best to
the user. We advise the user to explore the many settings
in conjunction with various kinds of input signals and
modulation signals to experience the full potential of this
powerful sound processor. Some combinations of signals and
settings may show minimal results and some may sound less
than pleasant but when a balance is struck, the outcome can
be quite remarkable and loads of fun to explore...
Open For A AC
10 11
& Open For B AC
A AC jumper is specific to the I. WAVE DRIVER
and B AC for II. WAVE FOLDER.
These jumpers are closed by default and make the TIMBER
DC coupled all the way from input to output. This means
it can (and should!) be used for processing slow voltage
signals (sequences / LFOs/ envelopes etc.). However, adding
SYMMETRY might result in voltage offset at the output which
might present some issues when used in audio signal path
which is not AC coupled (such as connecting outside of the
eurorack without output module). In such situations it is
advised to leave these jumpers open.
INV A Phase
12
This jumper can be used to invert the phase of the I. WAVE
DRIVER. When crossfading between the two shapers, this
might result in high pass character because the fundamental
frequency would be canceled out due to phase inversion. This
might become handy in some scenarios while in some others
it could be problematic..
Norm SHP CV_TO_MIX
13
Closing this solder jumper would normalize voltage
at the SHAPE CV input to X-FADE CV input.
Before connecting the ribbon cable to this module
disconnect your system from power !
!
Double check the polarity of the ribbon cable and that
it is not shifted in any direction. The red cable should be
attached to the -12V rail, both on the module and on the
bus board side!
please make sure of the following
� you have a standard pinout eurorack bus board
� you have +12 and -12 power rails on that bus board
� the power rails are not overloaded by current
Although we put protection circuits in the device, we do
not take any responsibility for damages caused by wrong
power supply connection.
After you connected everything, double checked it and
closed your system so no power lines can be touched
by your hand, turn on your system and test the module.
Timber
+12
(7)
!
-12
OPEN_FOR
A_AC
10
11
12
A_PHASE
13
NORM_SHP
CV_TO_MIX
Take it Carefully
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