Mixer & Switcher
Dual 2 to 1 mixers, normalized into 4 to 1
Click-less mute per mixer
Click-less polarity inversion per input with LED indication
Modulation vs. audio mode selection (lin/log) per mixer, with change of potentiometer curve response and LED indication.
Two LEDs on each output showing the amplitude and polarity of the output signal
Unconnected inputs present a fixed voltage to ease offset creation
Full range DC-coupled analog signal path
Switch among 4 inputs, only 2, or disabled
Select an input sequentially with a clock/trigger
Select an input randomly with a clock/trigger
Select an input in relation to a control voltage
CV and clock control are audio rate capable
Settings retained over the power cycle
High-quality potentiometers with metal shaft
Skiff-friendly & compact module
Mixwitch applications described in the manual
1. Control signal mixer
with pots acting linear
2. Audio mixer
with pots acting logarithmically and mix level muted by 6dB
3. Four step sequencer/randomizer
generating CVs for a sequential or random melody set by the 4 pots
4. Simple sub-octave generator
using only one half of the module
5. Complex sub-octaves generator
one and two octaves below freely mixed and tweaked
6. Simple granular synthesis
using any VCO with multiple wave outputs
7. Multiple-segment waveshaper
fill each quarter-wave with other waves segments
8. Phase-controlled wave-stitcher
using PWM for control and a pair of audio sources
9. Voltage controlled transposer
to up to 3 or 5 independent tunings
10. Drum randomizer
in combination with some rhythm pattern generator
11. Digital inverter / signal amplifier
using one half of the module
12. Voltage window comparator
does switching/gating when a signal is within a specific range
13. Drum selection in sequencing applications
using one CV/gate pair for 4 drum sounds
14. Random clocking – Chance generator
with settable occurrence
15. Two-input logic AND / NAND gate
for digital duties
16. Two-input logic XOR gate – Digital ring-modulator
for exclusive selection or MS20-like ring mod
17. Saw to PWM with manual or CV control
for audio shaping or LFO gate length adjustment
18. Hard clipping
for audio shaping and distortion
Focused versatility seems an oxymoron when describing the features that led us to design the Mixwitch.
With only a pinch of mixing, inverting and controlled switching, we brew up a plethora of combinations and uses.
This is voltage processing magic!
The Mixwitch design comes from a frustration with attenuvertors (bipolar attenuators-inverters) whose off (neutral) position is difficult to retrieve, especially in live situations.
We went for a digitally-controlled analog path where polarity inversion would be at the touch of a button. So, the usefulness of attenuating/inverting can be realized by turning the pot down, swiftly pressing the inversion button and reopening the level. The zero level is where you expect it, with the pot full down.
Once we had a clean polarity control, we easily added a mute function offering the benefit of pre- adjusted pot settings ready to be activated at will.
The next step was to bring something extra, useful and creative. There are plenty of analog switches controlled by a clock; but arbitrarily selecting an input with a voltage is less known. Having both control capabilities combined with our specific mixer features creates a unique fusion: welcome to the Mixwitch !