Wiard GR-331 User Manual

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Wiard Model GR-331 Envelator

remains on. When no LEDs are lit, the voltage is below 2 volts.

envelope completed the attack cycle time

Each envelope is individually switched.

the envelope function.

Wiard GR-331 Dual Envelator

Rev: 031001

Dual

Envelator

Audio

Control Voltage

Envelope Modulation Controls AMOD [knob] - Attack Modulation Setting - Attack

Modulation allows for voltage control of the attack time. This control allows adjustment of the amount of modulation to the attack time as input into the AMOD input jack. Positive voltages decrease segment time. DMOD [knob]- Decay Modulation Setting - Decay Modulation allows for the voltage control of the decay (or release) time. This control allows adjustment of the amount of modulation to the decay/release time as input into the DMOD input jack. Positive voltages decrease segment time.

Envelope Mode Selection AR/AD/Cycle [switch] - This switch determines

the function of the envelopes. When set to AR, the envelope will act as an AR envelope, maintaining full level until GATE [in] goes “low”. In AD mode, the envelope acts as an AD envelope, and will begin decay as soon as the attack stage is complete. The END output “pulses” when the decay stage is complete, in Cycle mode, this pulse is fed back to the envelope input, and will force the envelope to re-trigger (oscillate). In this mode, the Envelator output functions as a shaped triangle waveform LFO. When in Cycle mode, the SQR output acts as a square wave LFO with the pulse width determined by the settings of the A and D controls. This output can also be used to clock the Wiard Sequantizer.

Two circuits - ENV1, ENV2

Generator Processor

Cycle mode runs

into audio

range

Envelopes DC-coupled

Short evenlopes

triggered at

audio rate (into

GATE [in])

fader will mix

control voltages

cross-

LEDs

The LED bank is split into two sections, where each 4-lamp section shows the current output value (in volts) of its respective envelope. The LEDs increment in 2 volt steps. When the voltage is above 8 volts, the last LED

Envelope Controls A [knob] Attack - The attack time for the envelope. D [knob] Decay/Release - The decay and/or release

time for the envelope. If the AR/AD/Cycle switch is set to AR, this control is the release time used when a gate signal is removed from the GATE input jack. If the switch is set to AD or Cycle, this control is the decay time measured from the time that the

Mixer/Cross-fade Controls MIXMOD [knob] - The Mixture Modulation control is

an attenuator for the MIXMOD voltage input. This provides for the voltage control of mixed envelope (or other signal) cross-fading. When used as a voltage controlled ADSR, this acts as the sustain voltage control. MIX [knob] - The Mix control will cross-fade from the MIX1 and MIX2 input jacks, sending the output to the MIXOUT output jack. When the Mix control is used for the two envelopes in the Envelator, this control will allow you to create an ADSR:

• Use Envelope 1 in AD mode, Envelope 2 in AR mode.

• The positive outputs of the two envelopes are normalized to the MIX1 and MIX2 inputs (as indicated by the 1 and 2 below the in arrows).

• Set the MIX control to the 12 noon position (evenly mixing the two envelopes).

• Both attack stages will affect the attack stage, then the decay stage of Envelope 1 will drop the voltage to the sustaining level (as controlled by the MIX control). When the gate is released, the release stage of Envelope 2 will provide a release stage for the overall envelope shape.

• The MIXMOD knob behaves like a normal “sustain” level control, providing voltage control of the sustain level.

Envelope Trigger and Modulation AMOD [in] - Voltage control input for Attack rate

modulation. DMOD [in] - Voltage control input for Decay/Release rate modulation. GATE [in] - The gate or trigger input used to start

Envelope Outputs END [out] - When the Decay (or Release) phase of

the envelope is complete, a “pulse” is output from this jack.

OUT+ [out] - The positive envelope output. OUT- [out] - The negative envelope output. SQR [out] - The output of the trigger latch, where

the signal goes high during the attack phase and goes low for the decay portion of the envelope.

Mixer I/O MIX1 [in] - Input 1 for the Mix function. This input is normalized to the OUT+ output of Envelator 1. MIX2 [in] - Input 2 for the Mix function. This input is normalized to the OUT+ output of Envelator 2. MIXMOD [in] - An input signal that is added to the MIX control to cross-fade from MIX1 to MIX2

input. MIXOUT/ADSR [out] - The output of the Mix function. This output is normally a mix of the two Envelator positive outputs (ADSR).

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Wiard Model GR-331 Envelator

Dual Envelator First Order Units

AMOD

DMOD

GATE Cycle

Cycle

ENVELATOR

DMOD

OUT+

OUT-

SQR

END

MIX1

MIX2

MIX MIXMOD

MIX OUT

CROSSFADE

MIX

MIXMOD

Dual Envelator Second Order Units

OUT+

MIX1

ENV1

MIX2

MIX

OUT+

MIX OUT

ADSR

ENV2

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Wiard Model GR-331 Envelator

Dual Envelator Module Description

The Wiard envelope generator, the Envelator , is a multifunction dual slope linear function generator. The module contains two identical units.

The attack and decay slopes are individually voltage controllable with input attenuators. Each unit outputs the envelope, inverse of the envelope (negative going envelope), a voltage step signal during the attack phase, and a pulse at the end of the decay phase. The gate input has a three position switch which selects: Attack-Release where the output remains high as long as the gate is high, Attack- Decay where the decay phase begins immediately after the attack phase regardless of the gate level at the gate input. Cycle where the gate input is connected to the end pulse which causes the unit to act as an low frequency oscillator (LFO). The LFO extends into the low audio range and has triangle and square outputs. Any triangular or sawtooth shape

or pulse width can be adjusted by the attack and decay controls.

The module also contains a DC coupled voltage controlled cross-fader which forms the sustain control when patched as a classic ADSR. It can also be used to mix two modulation sources when patched as two LFOs. The cross-fader will also handle audio signal through the full audio range. This is useful for replicating oscillator waveshapers which cross-fade from a sine wave signal to a waveform with higher harmonic content. An example would be the Buchla Model 258 oscillator.

The Envelator module contains:

• Two Multi-mode envelope generators/oscillators which will work in the low audio range

• A voltage "cross-fader" which will work both for control voltages and audio signals

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Wiard Model GR-331 Envelator

Dual Envelator Example Patches

Assumptions

o Notation used: MPN (see Modular Patch Notation (MPN)

Explained for a discussion on MPN)

o Only one module: Envelators. o Two envelator circuits in a Dual Envelators module: Env1,

Env2.

Hello World

Top Envelators

Env1.Controls

[(AMOD, DMOD)=7, A=5, --Attack D=11, -- Release AR/AD/CYCLE SWITCH=AR]

Env2.Controls

[(AMOD, DMOD)=7, A=5, --Attack D=11, --Decay AR/AD/CYCLE SWITCH=AD]

Controls

[MIXMOD=7, MIX=12] --Sustain

Connect

[+VC ATTACK -> (Env1.AMOD, Env2.AMOD), +VC DECAY -> Env2.DMOD, +VC RELEASE -> Env1.DMOD, +VC SUSTAIN -> MIXMOD, KBD.GATE -> (Env1.GATE, Env2.GATE), MIX OUT -> +VCF and +VCA]

Comment

The classic ADSR attack patch. Both A knobs control the attack. Vary all AMOD and DMOD, and MIXMOD controls for different results.

Single Voice Tone

in effect MIXMOD is acting as a VCA, and the patch as a whole produces a voice. Not keyboard tracking.

Elementary Chaotic System

Top Envelators

Env1.Controls and Env2.Controls

[(AMOD, DMOD)=5, (A, D)=5, AR/AD/CYCLE SWITCH=Cycle]

Controls

[MIXMOD=7, MIX=12]

Connect

[Env1.OUT+ -> (Env2.AMOD, Env2.AMOD), Env2.OUT+ -> (Env1.AMOD, Env1.AMOD),, MIX OUT -> +VCF OR +VCA]

Comment

Vary all A and D controls for different results.

Alternating LFOs

Top Envelators

Env1.Controls

[(AMOD, DMOD)=7, (A, D)=3, AR/AD/CYCLE SWITCH=Cycle]

Env2.Controls

[(AMOD, DMOD)=7, (A, D)=12, AR/AD/CYCLE SWITCH=Cycle]

Controls

[MIXMOD=7, MIX=12]

Connect

[Env2.OUT+ -> Env1.OUT+, MIX OUT -> +LFO SIGNAL]

Top Envelators Env1.Controls

Comment

The output of the LFOs will alternate. [A=5, D=12,

Audio or LFO Synch

AR/AD/CYCLE SWITCH=AR]

Env2.Controls

[(AMOD, DMOD)=5, (A, D)=12, AR/AD/CYCLE SWITCH=CYCLE]

Controls

[MIXMOD=5, MIX=7]

Connect

[+DUMMY PLUG -> MIX1, Env1.SQR -> MIX2, --Optional Env1.OUT+ -> MIXMOD,

Top Envelators

Env1.Controls and

Env2.Controls

[(A, D)=3, AR/AD/CYCLE SWITCH=Cycle]

Controls

[MIXMOD=5, --Full on MIX=7]

Connect

[Env1.SQR -> Env2.SQR,

MIX OUT -> +MON] KBD.CV -> (Env2.AMOD, Env2.DMOD), KBD.GATE -> Env1.GATE,

Balanced Modulation

MIX OUT -> +VCF OR +VCA]

Top Envelators

Comment

In this patch, Env2 acts as an oscillator that is controlled by a keyboard pitch, while Env1 is used to control a VCA (using the mixer as a VCA) triggered by a keyboard gate signal. MIXMOD cross-fades from no signal (dummy plug) to the tone produced by Env2, so

Env1.Controls and Env2.Controls

[(A, D)=3,

AR/AD/CYCLE SWITCH=Cycle]

Connect

[Env2.OUT+ -> MIXMOD,

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Wiard Model GR-331 Envelator

Comment

Also called Ring Modulation, cross-fades between phase inverted signals. Note that Env1.OUT+ is normalized to MIX1.

Trigger Delay

Top Envelators Env1.Controls

Connect

Comment

Env1 is used to create a delay before Env2 is triggered. Hence Env1.END triggers Env2.

Pulse Bursts

Top Envelators

Env1.Controls

Env2.Controls

Controls

Connect

Env1.OUT- -> MIX2, MIX OUT -> +MON] --Balanced mod out

[A=5, D=11]

[KBD.GATE -> Env1.GATE, Env1.END -> Env2.GATE, Env1.OUT- -> MIX2, Env2.OUT+ -> +VCF OR +VCA] --Delayed env

[(AMOD, DMOD)=7, A=9, D=5, AR/AD/CYCLE SWITCH=AD]

[(AMOD, DMOD)=7, (A, D)=12, AR/AD/CYCLE SWITCH=CYCLE]

[MIXMOD=5, MIX=7]

[+DUMMY PLUG -> MIX1, Env1.SQR -> MIXMOD, Env2.SQR -> MIX2, KBD.GATE -> Env1.GATE, MIX OUT -> +Envelope trigger input] – Pulse Burst

JOYSTICK.X -> MIX1, --+10v signal

Env1.SQR -> MIXMOD,

MIX OUT -> Env2.GATE, --Inverter

KBD.GATE -> Env1.GATE]

Comment

Env2 starts at the end of Env1’s attack phase. In effect, MIX OUT acts as a logic inverter.

Comment

Used to create roll (>2) or flam (=2) triggers. Env1 creates a square long envelope while Env2 generates short square pulse train, which causes a burst of short pulses (Env2) for the duration of Env1. So Env1 is used to trigger the bursts. Vary Env1.A for different numbers of pulses, and Env2.A for pulse width and Env2.D for pulse spacing.

Quadrature Envelope

Top Envelators

Env1.Controls and Env2.Controls

[(A, D)=12, (AMOD, DMOD)=7, AR/AD/CYCLE SWITCH=any value]

Controls

[MIXMOD=5, MIX=7]

Connect

[+DUMMY PLUG -> MIX2,