Quantus Trajecta is a quad envelope designed with polyphony in mind. Each control universally adjusts all four envelopes, so keeping separate voices related on the fly is easy. Borrowing the structure of the envelope from the Cursus Iteritas Percido and adding even more shape control and a third mode, QT is musical, performable, and utilitarian.

• Type: Poly envelope generator
• Size: 10 HP
• Depth: .9 inches
• Power: 2x5 Eurorack
• +12 V: 40mA
• -12 V: 10mA

Input & output voltages#

QT’s gate inputs have a threshold of about 2 V. Its CV outputs have a range of 0 V to +5 V. Its CV inputs have a range of 0 V to +5 V; CV outside of this range will not harm the module but will be clipped.

INTERFACE

ADSR/Trem/A/D

Global mode setting for the four envelopes. ADSR is a traditional four-stage envelope with exponential curving for musicality. Trem is a unique three-stage envelope/LFO, useful for creating tremolo effects. A/D is a two-stage envelope with adjustable curves, similar to the envelope found on our Percido modules.

ADSR

Attack

The amount of time it takes the envelope to go from minimum to maximum.

Decay

The amount of time it takes the envelope to go from maximum to the Sustain level after the Attack stage.

Sustain

After Decay, the envelope holds at the level set by this parameter while the input gate is high.

Release

The time it takes to go from the Sustain level to minimum after the incoming gate goes low.

Trem

Attack

The amount of time it takes the envelope to go from minimum to maximum, and for the LFO to reach its maximum rate (set by Rate).

Rate

The maximum speed that the internal LFO oscillates.

Wub

The depth of LFO modulation.

Release

The time it takes to go from maximum to minimum after the incoming gate goes low, and for the LFO to decelerate.

A/D

Time

Sets the overall envelope time (affects both the attack and decay stages).

A/D

Sets the ratio of attack time versus decay time within the period set by Time. Fully left, the envelope will be a simple decay. Fully right, the envelope will be only attack. Points in the middle are a mix of both, with equal attack and decay times in the center.

A Curve

Adjusts the curve of the attack stage, from exponential to linear to logarithmic.D CurveAdjusts the curve of the decay stage, from exponential to linear to logarithmic.

Long/Medium/Short

Adjusts the minimum and maximum times for the envelopes.HoldFreezes all envelopes at their current level while the button is pressed or a high gate is present at the Hold jack.

In 1-4

Trigger/gate inputs. Inputs are normalled from left to right; patching to an input breaks normalization.

Out 1-4

Envelope outs.

CV ins

CV over corresponding parameters. Each knob acts as an offset and sums with CV inputs.

Etymology#

Quantus -- from Latin: "how many"

Quantus -- from Latin: "journey"

"Many journeys"