Introduction
The Blacet SB2780 Splitter and SB2790 Mixer are fully buffered precision modules designed for processing control
voltages and audio signals.
The Splitter is a “One to Three” module, taking one input and splitting it into three outputs. Channel A features an
attenuator. Channel B has a phase reversing attenuator, which will change the polarity of a CV or the phase of an
audio signal. Channel C is “straight thru” with no controls.
The Mixer is a “Three to One” module, mixing up to three input signals and providing one output. Channel A
features an attenuator. Channel B has a phase reversing attenuator, which will change the polarity of a CV or the
phase of an audio signal. Channel C is “straight thru” with no controls, although a trimmer on the PCB allows
setting the level from 50% to 100%. The factory setting is midpoint ( 75%.).
Operation Tips
A Splitter is similar to a “Multi” but with
more control options.
For example, if you have only one EG1
(ADSR), you can split the EG output to
drive both a filter and a VCA. Use the “C”
out to control the VCA.
Use the “B”out for the filter frequency as
this allows you to fine tune the sound as
well as reversing the sweep with the “B”
pot phase control.
You can also use the “A” out to control the
VCO octave, filter Q, etc.