POWER CONSUMPTION
QUIESCENT: +29mA, -29mA
MAXIMUM: +47mA, -44mA
0V
+5V
(+/-5V input signal)
(+5V rectified output)
WHAT IS SIGNAL RECTIFICATION?
The graph to the right illustrates the function of DETECT-Rx’s signal rectifier.
FIGURE
(
a.
) Shows an example bipolar input signal from the Triangle output of a VCO. The BLUE arrows highlight the negative
portion of this bipolar signal. Note the entire region from 0V to -5V.
FIGURE
(
b.
) Shows the rectified output. The RED arrows highlight the previously negative region of the Triangle waveform in
FIGURE (a.)
They are now flipped (rectified) into the positive voltage region.
Notice that the rectified signal is now twice the frequency of the input signal. This is the typical function of ‘octave up’ guitar
effects and can also be used for the same function in a modular synthesizer.
Also try using the rectifier on a total mix or external audio for extreme 2nd harmonic (even ordered) distortion effects.
OTHER COMMON USES
:
Not all control voltages are compatible.
For instance, there are modules that
produce bipolar
control voltages and modules that only
accept positive
control voltages.
Therefore, a bipolar CV will only affect a positive CV input when the input signal is positive.
A rectifier can be used to convert bipolar or even completely negative CV into a full range positive control voltage.
a.
b.
-5V
+5V
WHAT IS GATE EXTRACTION?
The graphs to the right illustrate the function of DETECT-Rx’s gate extractor. The examples show a Triangle wave in GREY as
the input to the EXTRACT-R.
For this example, we will consider that the RANGE switch set to 5 or 10V.
The broken GREEN line is a graphical representation of various threshold settings of 0-60%.
The BLACK waveforms illustrate the output gate for the respective threshold levels, explained below.
FIGURE
(
c.
) Shows the threshold set to 0V (zero volts). Notice that the gate goes high for the entire duration that the input
waveform is positive.
FIGURE
(
d.
) Shows the threshold set to roughly 2.5V. Notice that the gate is more narrow in this example because the region
above the threshold is also more narrow.
FIGURE
(
e.
) Shows the threshold set to roughly 4.5V. As expected, the gate is now very thin and fast, behaving like a trigger.
A trigger is simply just a very fast gate.
FIGURE
(
f.
) Shows the threshold set to beyond the region where the input signal is active. Since there is no signal voltage
that reaches this threshold setting, there will be no gate or trigger output.
c.
-5V
+10V
0V
d.
+5V
-5V
+10V
0V
f.
e.
A FEW EXTRACT-R USES
:
Extract a gate clock from audio or drum machines to time events within a modular system.
Create delayed gates and triggers from slower control voltages such as LFOs and Envelopes.
Convert any signal from a VCO into a pulse. Use a Sine, Triangle or any sloped waveform as a control voltage into THR CV to time vary the pulse width (Pulse Width Modulation.)
Produce extremely heavy distortion when patching audio into the EXTRACT-R input.
Utilize the GATE output normalization into the DETECT-R to create an adjustable slew gate (gated envelope).
Create threshold based events within a complex patch.
Boost 5V and low level gates and triggers up to 10V.
+5V
-5V
0V
+10V
WHAT IS AN ENVELOPE DETECTOR?
An Envelope Detector follows the amplitude dynamics of a given input signal. The output is a positive control voltage that can be used to modulate any parameter in a modular system. Since the output CV follows the input signal’s
amplitude levels, an Envelope Detector is also commonly referred to as an Envelope Follower.
The DETECT-R includes special features for greater control of the output envelope shape. The FREQ select switch provides three signal bands to choose from, allowing for finer control of the output signal based on the input
frequency content. The figures below illustrate the general envelope shapes for the relevant frequency bands. Envelope outputs are shown in GREEN, Peak level shown in ORANGE.
The SMOOTH control adds an additional 6 dB low pass filter that will alter the attack and decay respinse of the output and smooth the ripples, for example, as seen in the ‘HI’ figure, below. The cutoff frequency of the SMOOTH filter
scales to the selected frequency band, which allows the DETECT-R to be tuned across the entire audio spectrum.
HI
MED
LOW
A FEW DETECT-R USES
:
Side chaining
Dynamics processing
Signal processing
Slewing control voltages
Gated envelope generation
GAIN
/
ATTENUATION