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Q155 Curver
Aug 6, 2019
The Q155 provides a collection of four useful and experimental processing func-
tions to manipulate control voltages and audio, all packaged in a single-wide
module.
The Curver section bends signals into new shapes providing new modulation
possibilities and changes harmonics in audio waveforms. Curve a triangle wave
into a smooth sine or a peaky wave with high-frequency harmonics. Convert
standard envelope attacks into a linear shape and bend pitch voltages into ob-
scurity. Signal curving can be performed manually with the knob or via control
voltage. The control voltage input has a built-in inverting attenuator.
The Inverter section provides control of a signal's polarity via voltage control.
This works with audio and control to mangle sounds and sequences in surpris-
ing and unexpected ways.
The Slope Detector section produces a digital output indicating the slope of a
waveform. When the waveform is rising the output is positive, when falling the
output is zero. What you do with that output is up to you - control a filter, trigger
one envelope from another, control LFO modulation, etc.
The bottom section of the Q155 is a simple and useful VCA to control the ampli-
tude of a signal under voltage control. When CV=0 volts the output is off, when
CV=5 volts the output is full on. Like patch cables, you can never have enough
VCAs.
Q155 Curver Specifications
Panel Size: Single Width 2.125"w x 8.75" (Moog Unit Format).
Curver CV: -5V - +5V
Curver Input/Output Signals: 10Vpp.
Inverter CV: -5V - +5V
Inverter Input/Output Signals: 10Vpp.
Slope Detector Input Signal: 10Vpp.
Slope Output: 0V=down, 5V=up.
VCA Response: Linear, 5V=unity.
Power Requirement: +15V@60ma, -15V@60ma, +5V@20ma. Synthesizers.com standard.
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Summary of Contents for Synthesizers.com Q155
- Page 1 What you do with that output is up to you - control a filter, trigger one envelope from another, control LFO modulation, etc. The bottom section of the Q155 is a simple and useful VCA to control the ampli- tude of a signal under voltage control. When CV=0 volts the output is off, when CV=5 volts the output is full on.
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Page 2: Panel Overview
Q155 Curver Panel Overview The Q155 module consists of 4 independent sections - they can be patched together or used inde- pendently. Manual control of curve. Curver Section Bend signals Voltage control of curve via manual or with inverting attenuator. - Page 3 Q155 Curver Curver Section The Curver section takes an input signal, typically 10V peak-to-peak, and produces an output signal that is bent either concave, convex or unbent. Bending is determined by the combination of the knob, the CV (Control Voltage) input and its invert-able attenuator knob.
- Page 4 Q155 Curver Curver Section Patch Ideas In this basic synth patch VCO-->VCF-->VCA, an oscillator's output is curved under voltage control to change harmonics. A Triangle waveform works best since it can be bent into a sine-wave-like wave with few harmonics or a peaky wave with many harmonics. The control voltage in this case comes from the keyboard velocity.
- Page 5 Triangle Use the inverter section to invert gate signals or envelopes. In this example, gate from a sequencer is patched through the Q155 and the gates polarity is controlled by a row of sequencer knobs. Q155 Curver Q125 Processor...
- Page 6 Q155 Curver Slope Section Patch Ideas The Slope section produces a digital gate output based on the slope of the input. If the input waveform is rising then the slope output will be +5V. If the input waveform is falling then the output will be 0V. This output can be used as a gate to trigger envelopes, step sequencers, modify filters, or even as audio.
- Page 7 VCA Section Patch Ideas The bottom section of the Q155 is a simple utility VCA (Voltage Controlled Amplifier). It takes an input signal and controls its amplitude. A CV of 0 volts results in no output. A CV of 5 volts results in full output (unity gain).
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