CS-8 ol HDH6/VDL6 Rev1.04, Feb. 2015
-2-
PREFACE
First of all, congratu lations on the pu rchase of this 3U eu ro rack synthesizer
module. This manual contains a condensed description of the functionality
and addresses users with a certain level of elementary technical knowledge.
The current CS-8 ol series determines generally products, which are realized in
a so-called "open loop" design. These are electronic circuits working without
high amplification amplifiers and then stabilizing and linearizing feedback
loops. In earlier times (1970s years) these technique were widely used. Typical
sound properties are featured by warmth and creaminess.
In this manu al the first two produ cts will be described, namely the voltage
controlled filters (VCF)
HDH6
and
VDL6
. HDH6 stands for
H
orizontal
D
iode
H
igh-pass with
6
poles in the transfer function, which means a maximum
slope of 36 db/octave. Accordingly to this VDL6 stands for
V
ertical
D
iode
L
ow-
pass with also a slope of 36 db/octave. Each of these filters is contructed as a
true
dual
filter containing two identical and independent filters A and B. Each
filter, A and B, provides 4 simultaneous outputs with different slopes, which
are clearly different in sound. By mixing and/or subtracting and/or sharing of
the overall 8 outputs one obtain mighty musical, creative possibilities. The
modu le is designed with a width of 19 PU (part u nits, 1 PU=5.08mm) for
installation into a 3 HU (height units) modular rack with a built in
±
12 V power
supply.
Furthermore the module is equipped with CV (
C
ontrol
V
oltage)-inputs for
cutoff-frequency (
FREQ
) and resonance (
RESO
), separately for each channel
that true and independent dual/stereo audio operating is possible.
Design and implementation meet highest technical standards concerning
usability, sound quality, and electromagnetic immunity. The entire design and
production work was done in Germany.
Made in Germany
