Rev. 5 – Jun 2020 Page 80 of 91
321
Figure 79: 321 interface.
A 321
A.1 Inputs
A.2 Outputs
A.3 Sum Output
A.4 Unpatched Sum Output
A.5 Scale
A.6 Phase Switch
A.7 -6dB Switches
A.8 Offset
A.9 Offset Switch
The 321 includes the most useful functions we always
need in every patch, to edit and combine dynamically the
signals in use.
It is capable of scaling any incoming signal, invert its
phase, offset it, and combine with other signals. It is com-
pletely DC coupled, so may work well for both audio and
CV. It can also be used as a CV source.
1 DESIGN
The 321 is composed of three identical sections, the red,
yellow and green, where each of those is capable of scal-
ing any signal, from 0 up to 2 times (+6dB), flip its phase,
and apply a DC offset, allowing to shift your audio or CV
up or down.
In case no signals are connected to the section input
(A.1), the offset may act as a CV source too.
The three sections are then summed together into two
independent summing stages: the top right jack (A.3) out-
puts the sum of all three sections, while the top left one
(A.4) outputs the sum of the unconnected sections only
(semi-normalled). The 321 is entirely DC coupled, allow-
ing the process of control voltages as well as audio signals.
In case CVs or audio signals are particularly hot, the
two 6dB attenuators (A.7), one per each summing section
might be helpful to reduce exactly by 50% the incoming
signals.
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