BOCUMA SQUIVEL SV VCF BMA 005 User manual

Título
Subtítulo
BMA_005 ESQUIVEL SV VCF
User's manual

introducción
Congratulations on your acquisition of ESQUIVEL, our voltage controlled
variable state filter and our humble tribute to the of space-age pop, Juan
García Esquivel, who was probably one of the first Mexican musicians to
experiment with electronics to enrich his musical creation (he himself was
an electronics engineer graduated from the National Polytechnic).
We designed Esquivel around a diode ladder topology, which gives it a
very warm sound in its resonance and filtering. We hope you enjoy it as
much as we enjoyed designing and assembling it for you.
E S Q U I V E L - S T A T E V A R I A B L E V O L T A G E C O N T R O L L E D F I L T E R
W W W . B O C U M A . M X

Medida y formato: 14 HP EURORACK
Consumo de poder: +/- 12V 12mA
Estado variable LP, BP y HP con funcionamiento individual mediante el
switch selector.
Topología de escalera de diodos.
E S Q U I V E L - S T A T E V A R I A B L E V O L T A G E C O N T R O L L E D F I L T E R
SPECS Y LAYOUT.

1 2
3
4
5
1. Cutoff control
2. Resonance control or "Q".
3.CV Inputs 1 and 2.
4. Status selector and output connector.
5. Input mixer, IN 1, IN 2 and IN 3.

Connect an audio signal to any of the inputs on your mixer (5) and turn
the corresponding level knob clockwise.
Select the desired filter mode on the status selector switch (4), the
output signal after the filter will be on this connector.
Experiment with cutoff control (1) and resonance (2) to filter the signal.
To add CV you can connect your control signals to any of the 2 CV input
jacks (3) and adjust their level with the corresponding attenuation knob.
These two CV signals modulate the level cutoff, you can connect two
different signals and adjust their levels to obtain more complex or
randomized control signals.
Once you have installed your ESQUIVEL module in your rack you will be
able to use it as follows:
1.
2.
3.
4.
QUICK START.
A N O T E A B O U T R E S O N A N C E :
Resonance in an audio filter is achieved by injecting the output signal into
the input signal a second time, in a kind of feedback. We have adjusted the
levels of this feedback in our calibration process so that it does not exceed
the 10vpp at the output (with the resonance at maximum) that is commonly
used as a level in audio signals for Eurorack systems. We strongly
recommend that the user take care to adjust the corresponding input levels
in the mixer (5) so that the volume level after the filter is acceptable to the
ear and the other modules in the system.

to finish...
Our inspiration to create is you and all the musicians and sound artists who
challenge the status quo to explore new horizons and, to do so, make use
of technology and innovation.
Esquivel takes his name from the master of space age-pop, who at the time
made use of his background in electronic engineering to take his
compositions to other destinations.
Designed and assembled with a lot of passion in Guadalafunk, Mexico.
August 2021.
W W W . B O C U M A . M X