21
676
TU B E M I C
CHAN N E L STR I P
Sidechain Application
Use this configuration to use the 676’s built-in compressor as a de-esser. De-essing is typically used to reduce the level of
‘sibilant’ frequencies in vocals, which can make them sound abrasive and unpleasant. Excess sibilance can be caused by
compression, mic selection and/or placement, or by the vocalist’s technique. The sibilant range of frequencies is typically
located between around 2-10kHz, depending on the vocalist.
De-essing is a form of frequency-weighted compression. In the 676, it is accomplished by patching an external EQ into the
compressor’s SIDECHAIN INSERT jack. Boosting frequency bands on the external EQ will then increase the amplitude of the
selected range of frequencies making the compressor react to them before other frequencies.
Application Notes:
• The COMPRESSOR / LIMITER output will carry the ‘de-essed’ signal. However, you can also connect the PREAMP output
and send its signal to another input or track if you wish to have a version of the unprocessed signal for backup.
• Note that connecting the SIDECHAIN INSERT jack to a normalled patchbay allows for additional creative sidechaining
capabilities (for example, for triggering compression on the bass guitar every time the kick drum hits), see ‘
‘Using The
676 Compressor At Mixdown’ on page 22
for additional information on connecting the SIDECHAIN INSERT to a
patchbay.
PEAK
EQ
ENABLE
COMP/LIM
ENABLE
NARROW
CONTOUR
SIDECHAIN
ENABLE
OVEREASY
DIGITAL
OUTPUT
POWER
|
20dB
PAD
+48V
POLARITY
INVERT
80 Hz
LOW CUT
+
0
–
PEAK
LIMIT
GAIN
dB
+55
+25
+50
+40
-
∞
POST TUBE
ATTENUATION
dB
-
∞
0
-30
-5
-15
LOW
dB
-15
+15
0
MID
dB
-15
+15
0
HIGH
dB
-15
+15
0
AUTO
RELEASE
dB/sec
4k
10
400
1.5k
70
ATTACK
dB/msec
400
80
200
10
1
LIMITER
dBu
RED: 96kHz
GREEN: 48kHz
YELLOW: 44.1 kHz
-4
+2
+18
+10
OFF
THRESHOLD
dB
-40
0
+20
-10
-20
-30
+10
RATIO
1:1
∞
:1
1.5:1
3:1
2:1
1.2:1
8:1
FREQ
Hz
1k
100
8k
200
4k
MAKEUP
GAIN
dB
-20
+20
0
-10
+10
INSTRUMENT INPUT
ENABLE
CLAS
S “
A
” V
A
CU
U
M TU
B
E WITH H
IG
H V
OL
TA
G
E GAI
N
METER SELECTION
INPUT
OUTPUT
G.R.
PEAK
EQ
ENABLE
COMP/LIM
ENABLE
NARROW
CONTOUR
SIDECHAIN
ENABLE
OVEREASY
DIGITAL
OUTPUT
POWER
|
20dB
PAD
+48V
POLARITY
INVERT
80 Hz
LOW CUT
+
0
–
PEAK
LIMIT
GAIN
dB
+55
+25
+50
+40
-
∞
POST TUBE
ATTENUATION
dB
-
∞
0
-30
-5
-15
LOW
dB
-15
+15
0
MID
dB
-15
+15
0
HIGH
dB
-15
+15
0
AUTO
RELEASE
dB/sec
4k
10
400
1.5k
70
ATTACK
dB/msec
400
80
200
10
1
LIMITER
dBu
RED: 96kHz
GREEN: 48kHz
YELLOW: 44.1 kHz
-4
+2
+18
+10
OFF
THRESHOLD
dB
-40
0
+20
-10
-20
-30
+10
RATIO
1:1
∞
:1
1.5:1
3:1
2:1
1.2:1
8:1
FREQ
Hz
1k
100
8k
200
4k
MAKEUP
GAIN
dB
-20
+20
0
-10
+10
INSTRUMENT INPUT
ENABLE
CLAS
S “
A
” V
A
CU
U
M TU
B
E WITH H
IG
H V
OL
TA
G
E GAI
N
METER SELECTION
INPUT
OUTPUT
G.R.
Instrument Input
Disabled
Compressor/Limiter
Enabled
Mic
EQ
In
Out
Graphic EQ
BYPASS
POWER
OUTPUT
20
25
31.5
40
50
63
80
100
125
160
200
250
315
400
500
630
800
1k
1.25k
1.6k
2k
2.5k
3.15k
4k
5k
6.3k
8k
10k
12.5k
16k
20k
GAIN
dB
-20
+20
-10
+10
0
Sidechain
Enabled
or
or
Tape Recorder
Audio Interface
Live Sound Mixer
Ch. 2
Ch. 1
Insert Cable
Optional
Send (T
ip)
Return (Ring)
Содержание dbx 676
Страница 1: ...Owner s Manual 676 TUBE MIC CHANNEL STRIP...
Страница 30: ...28 676 TUBE MIC CHANNEL STRIP Specifications TBD...