Bastl Instruments Tea Kick Instructions
Text of the manual
more than just a drum
ATTENUATOR
more than just a tea
TUNE
RESONANCE
R
A
G
E
CLICK TUNE
TRIGGER
CV
WTF IN
CLICK
SQUARE
OUTPUT
K
T
TEA KICK
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RESONANCE control affects how resonant the circuit
is. However, the resonance also affects the tuning:
the more resonant, the lower the drum sound. Add
resonance to get longer decaying drum sounds. The
resonance range switch can prevent the resonance
from self oscillating. When you switch it up the
resonance control makes the circuit self oscillate
andthen it can be used kind of as a VCO.
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Tea kick also has a click generator with tone control.
The click tune control also affects the timbre of the
twin T circuit.
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TRIGGER input triggers the dampened sinewave
generation at lower resonance settings. Connecting
an audio rate signal to this input results in very pleasing
waveforms at the output. The trigger is visualized by
the led.
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The twin T circuit can also act as a bandpass filter, for
which there is a WTF input. The aim of the tea kick is
not to provide you with a perfect BPF though, so this
feature has more of an experimental character and lets
you access another interesting point of the circuit.
Tea kick is a universal analog circuit, based on an
improved version of the twin T resonant drum sound
design. When a trigger signal is sent to the circuit, it
generates a classic dampened sine wave sound.
instruction
Tea Kick
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MORE THAN JUST A DRUM
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TUNE is the main control knob for tuning the pitch,
which can also be affected via the CV Input and
ATTENUATOR.
CV input is for tuning the circuit so the sound can
range from a bass drum through all the toms up to
a woodblock.
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CV input goes through the attenuator and is mixed
with the voltage from the TUNE knob, to create the
final pitch control voltage.
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The click output takes the click impulse away from
the OUTPUT, so you could for example mix it in an
external mixer at a different volume, or use it for other
experimental purposes.
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The Tea kick has a buffered OUTPUT but is also fed
through a comparator which generates a square wave
on the SQUARE OUT.
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A resonance adjustment trimmer on the back limits
the lower resonance range
� bass drum generator
� Tune knob for adjusting pitch
� CV input with attenuator for Tune
� resonance knob
� resonance range switch (low range limits the
circuit from self oscillation)
� click tune knob – adjusts pitch of click added to
the drum body
� click output jack – when plugged in it puts the
click out of the main output
� buffered output
� square wave output
� trigger input
� wtf input (acts something like band pass filter
but not really:)
� trimmer to adjust the resonance range
� handmade in Brno, Czech republic
technical details
features
� 5HP
� 35mm deep (skiff friendly)
� current +12: <15mA, -12 <15mA
� PTC fuse and diode protected 16 pin power connector
Tea kick can be either used as predictable drum circuit,
or it can go totally nuts as an experimental oscillator.
There are several ways how to route inputs and outputs
to generate feedback loops, to generate a signal.
However, there are also several ways you can try to
modify and filter a signal from another VCO. We highly
recommend to route any oscillator into the trigger
input. There is a lot to explore in here.
Beyond the drum
Take it Carefully
P C B
+12
red
reso. adjust
GND
-12
BASTL-INSTRUMENTS.com
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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 match the -12V rail both on the module and
on the bus board !
please make sure of the following
� you have a standard pinout eurorack bus board
� you have +12V and -12V 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 hand, turn on your system and test
the module.
!
Connecting module to your system
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