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Manual-1

G4

QUAD GATE / DUCKER / EXPANDER

OPERATORS MANUAL

WEAR PARTS:

 This product contains no wear parts.

Quick Start

If you read just one page of a manual this year, it should be this one.

If you are not familiar with the operation of Gates, Duckers and Expanders, see the Operation section on page Manual-4  for a 

good tutorial. For those of you familiar with their operation, this quick start should help you get up and going fast.

Basic Gating:

 The G4 allows complete Gate envelope control: Threshold, Attack, Release and Hold. Side-chain metering accurately 

and consistently indicates where the key signal is relative to the Threshold (dBr). 

A good starting procedure is as follows:

1. Select the GATE mode and set for BYPASS.

2. Select side-chain key source for INTernal or EXTernal as required.

3. Set ATTACK to 0 ms, RELEASE for 250 ms, HOLD for 125 ms and DEPTH for 20 dB.

4. Select side-chain LISTEN.

5. Listen to the key signal and adjust the LOW-CUT and HIGH-CUT filters to respond only to frequencies of interest.

6. Watch the SIDE-CHAIN meter and adjust the THRESHOLD until the yellow TH indicator lights at the desired level.

7. Set the side-chain from LISTEN to NORMAL and the BYPASS to ACTIVE.

Basic ducking:

 As with the gate, the G4 provides complete Ducking envelope control. Figure 5 on page Manual-6 graphs the re-

sponse. A good starting procedure is as follows:

1. Select the DUCK mode and set for BYPASS

2. Select side-chain key source for EXTernal. Ducking 

always uses

 

an 

external

 side-chain key input.

3. Set ATTACK to 0 ms, RELEASE for 1 second, HOLD for 3 seconds and DEPTH for 20 dB.

4. Select side-chain LISTEN.

5. Listen to the key signal and adjust the LOW-CUT and HIGH-CUT filters to respond only to frequencies of interest.

6. Watch the SIDE-CHAIN meter and adjust the THRESHOLD until the yellow TH indicator lights at the desired level.

7. Set the side-chain from LISTEN to NORMAL and the BYPASS to ACTIVE.

Basic Expander:

 Expander operation is similar to that of the Gate, with two important control differences:

• The HOLD control is not active in EXPand mode.

• The RATIO control is used in place of the DEPTH control.

1. Select the EXPand mode and set for BYPASS.

2. Select side-chain key source for INTernal or EXTernal as required.

3. Set ATTACK to 100 ms, RELEASE for 500 ms, RATIO for 3:1.

4. Select side-chain LISTEN.

5. Listen to the key signal and adjust the LOW-CUT and HIGH-CUT filters to respond only to frequencies of interest.

6. Watch the SIDE-CHAIN meter and adjust the THRESHOLD until the yellow TH indicator lights at the desired level.

7. Set the side-chain from LISTEN to NORMAL and the BYPASS to ACTIVE.

Contents

Front Panel Controls ...........................................................2

Operation ............................................................................4

   Side-chain Detector .........................................................4

   Gate Mode.........................................................................4

   Expand Mode ....................................................................5

   Duck Mode ........................................................................6
Kick Drum Attack Example ................................................6

ms

ms

n:1

dB

Hz

Hz

MASTER

SLAVE

MASTER

SLAVE

Sec

QUAD GATE

6 12

-12 -6 -3 -1

3

1

-24

dBu

6 12

-12 -6 -3 -1

3

1

-24

6 12

-12 -6 -3 -1

3

1

-24

6 12

-12 -6 -3 -1

3

1

-24

-60

-20 -10

-30

-40

-50

10

20

0

250

50

25

100

0

2 Sec

250

125

500

25

3

.5

.25

2

0

8

4

2

6

1

0

40

60

20

80

5k

315

80

1.25k

20

20k

2k

630

6.3k

200

ms

ms

n:1

dB

Hz

Hz

Sec

dBu

-60

-20 -10

-30

-40

-50

10

20

0

250

50

25

100

0

2 Sec

250

125

500

25

3

.5

.25

2

0

8

4

2

6

1

0

40

60

20

80

5k

315

80

1.25k

20

20k

2k

630

6.3k

200

ms

ms

n:1

dB

Hz

Hz

Sec

dBu

-60

-20 -10

-30

-40

-50

10

20

0

250

50

25

100

0

2 Sec

250

125

500

25

3

.5

.25

2

0

8

4

2

6

1

0

40

60

20

80

5k

315

80

1.25k

20

20k

2k

630

6.3k

200

ms

ms

n:1

dB

Hz

Hz

Sec

dBu

-60

-20 -10

-30

-40

-50

10

20

0

250

50

25

100

0

2 Sec

250

125

500

25

3

.5

.25

2

0

8

4

2

6

1

0

40

60

20

80

5k

315

80

1.25k

20

20k

2k

630

6.3k

200

G4

ATTACK

RATIO

HOLD

RELEASE

THRESHOLD

LOW-CUT

HIGH-CUT

1

2

DEPTH

3

4

TH

CLOSED

OPEN

SIDE-CHAIN dBr

BYPASS

ACTIVE

EXT

INT

LISTEN

NORMAL

LINK

LINK

DUCK EXP

GATE

SIDE-CHAIN

POWER

OL

ATTACK

RATIO

HOLD

RELEASE

THRESHOLD

LOW-CUT

HIGH-CUT

DEPTH

TH

CLOSED

OPEN

SIDE-CHAIN dBr

BYPASS

ACTIVE

EXT

INT

LISTEN

NORMAL

DUCK EXP

GATE

SIDE-CHAIN

OL

ATTACK

RATIO

HOLD

RELEASE

THRESHOLD

LOW-CUT

HIGH-CUT

DEPTH

TH

CLOSED

OPEN

SIDE-CHAIN dBr

BYPASS

ACTIVE

EXT

INT

LISTEN

NORMAL

DUCK EXP

GATE

SIDE-CHAIN

OL

ATTACK

RATIO

HOLD

RELEASE

THRESHOLD

LOW-CUT

HIGH-CUT

DEPTH

TH

CLOSED

OPEN

SIDE-CHAIN dBr

BYPASS

ACTIVE

EXT

INT

LISTEN

NORMAL

DUCK EXP

GATE

SIDE-CHAIN

OL

Summary of Contents for G4

Page 1: ... 6 3k 200 ms ms n 1 dB Hz Hz Sec dBu 60 20 10 30 40 50 10 20 0 250 50 25 100 0 2 Sec 250 125 500 25 3 5 25 2 0 8 4 2 6 1 0 40 60 20 80 5k 315 80 1 25k 20 20k 2k 630 6 3k 200 G4 ATTACK RATIO HOLD RELEASE THRESHOLD LOW CUT HIGH CUT 1 2 DEPTH 3 4 TH CLOSED OPEN SIDE CHAIN dBr BYPASS ACTIVE EXT INT LISTEN NORMAL LINK LINK DUCK EXP GATE SIDE CHAIN POWER OL ATTACK RATIO HOLD RELEASE THRESHOLD LOW CUT HI...

Page 2: ...ompletely disconnect this apparatus from the AC mains disconnect the power supply cord plug from the AC receptacle 16 This apparatus shall be connected to a mains socket outlet with a protective earthing connection 17 When permanently connected an all pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the electrical installation of the building 18 If...

Page 3: ...rtant control differences The HOLD control is not active in EXPand mode The RATIO control is used in place of the DEPTH control 1 Select the EXPand mode and set for BYPASS 2 Select side chain key source for INTernal or EXTernal as required 3 Set ATTACK to 100 ms RELEASE for 500 ms RATIO for 3 1 4 Select side chain LISTEN 5 Listen to the key signal and adjust the LOW CUT and HIGH CUT filters to res...

Page 4: ... with an averaging time constant of 50 ms Gate status is shown using a seven segment gain reduction gate meter This meter is effectively an expanded version of the simple stop light meter found on many gates The inclusion of gain reduction metering allows the user to view the transi tion progress of the Gate and Ducker as well as the current gain reduction when in Expand mode The CLOSED LED is not...

Page 5: ...put jack is the source Side chain source switches remain independent in Link mode A wiring diagram to make your own insert cable is below Side Chain Normal Listen The NORMAL LISTEN switch allows the user to listen to the filtered side chain key signal When set to LISTEN the filtered side chain key signal is routed to the output Listening to the filtered key signal assists in adjusting the side cha...

Page 6: ...pired The attack setting is equal to 3 time constants or the time it takes to reach 95 of the final value Because the attack is a time constant it takes the same period of time to reach 95 of final value regardless of the Gate depth This means the Gate will open in the same period of time from a depth of 80 dB or 6 dB The minimum hold time is 25 ms and is based on two parameters The peak detector ...

Page 7: ...ead pre ramping 500 Hz signal At 500 Hz the exponential pre ramp ensures that the first cycle is properly gated on Look ahead pre ramping produces a more natural leading edge to the wave form tightening up the sound without the harsh click that occurs with an instantaneous rise time Figure 4 Gate vs Expander The above graph shows the difference between Gate and Expander operation The solid red tra...

Page 8: ...changed if the gate can not accu rately capture the first cycle Look ahead without ramping often causes an audible click at fast attack and moderate to extreme depth settings Only look ahead pre ramping as done in the G4 accurately reproduces the 1st cycle of a kick drum without adding excessive delay or significantly altering the leading edge 107405 Rane Corporation 10802 47th Ave W Mukilteo WA 9...

Page 9: ...3 5 25 2 0 8 4 2 6 1 0 40 60 20 80 5k 315 80 1 25k 20 20k 2k 630 6 3k 200 ms ms n 1 dB Hz Hz Sec dBu 60 20 10 30 40 50 10 20 0 250 50 25 100 0 2 Sec 250 125 500 25 3 5 25 2 0 8 4 2 6 1 0 40 60 20 80 5k 315 80 1 25k 20 20k 2k 630 6 3k 200 G4 ATTACK RATIO HOLD RELEASE THRESHOLD LOW CUT HIGH CUT 1 2 DEPTH 3 4 TH CLOSED OPEN SIDE CHAIN dBr BYPASS ACTIVE EXT INT LISTEN NORMAL LINK LINK DUCK EXP GATE SI...

Page 10: ...3 5 25 2 0 8 4 2 6 1 0 40 60 20 80 5k 315 80 1 25k 20 20k 2k 630 6 3k 200 ms ms n 1 dB Hz Hz Sec dBu 60 20 10 30 40 50 10 20 0 250 50 25 100 0 2 Sec 250 125 500 25 3 5 25 2 0 8 4 2 6 1 0 40 60 20 80 5k 315 80 1 25k 20 20k 2k 630 6 3k 200 G4 ATTACK RATIO HOLD RELEASE THRESHOLD LOW CUT HIGH CUT 1 2 DEPTH 3 4 TH CLOSED OPEN SIDE CHAIN dBr BYPASS ACTIVE EXT INT LISTEN NORMAL LINK LINK DUCK EXP GATE SI...

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