Operating The Mixer; Front Panel Modes; Audio Mute And Bypass; Monitoring - Shure IntelliMix SCM820-DB25 User Manual

Front Panel Modes

IntelliMix®
IntelliMix®
1 2 3
For Channels 1-8
and Aux
Channel Inputs
The channel knobs operate in five modes for different types of input signal
adjustment and display. Use the front panel mode selection button to select
from the following modes.
Channel Gain ( )
gain
Adjust gain within a 128 dB range while displaying
the gain setting on the LED ring. Unity gain is at the
9th LED.
Low Cut ( )
low cut
Adjust the frequency of the low cut filter (6 dB/octave
from 25 to 320 Hz). Use to remove low-frequency
noise such as table vibrations or air-conditioning
rumble.
High Shelf ( )
hi shelf
Adjust the high shelf boost or cut (± 12 dB at 5
kHz). Use to add presence to muddy vocals, temper
sibilant vocals, or enhance the sound of off-axis
lavalier microphones.
Input Signal Meter (
ch. meter
LEDs display the input signal level in real-time.
Channel gain is adjustable in this mode, and will
momentarily display channel gain setting during
adjustments.
IntelliMix Gain Meter ( and
gain
LEDs display the IntelliMix attenuation applied
in realtime. Channel gain is adjustable in this
IntelliMix®
mode, displaying the setting on the LEDs during
adjustments.
Mix Outputs
The mix output knob operates in two modes to control
the mix output. Use the master function button to
select one of two modes.
Output Gain ( )
gain
Rotate to adjust the output gain of the selected mix.
The output signal level is displayed on the meters.
Limiter Threshold ( )
limiter
Rotate to adjust the limiter threshold of the mix (−2
to −50 dBFS). The limiter threshold level is displayed
on the meters.

Audio Mute and Bypass

Mute Channel Input
Press and hold the input channel knob while in
channel status LED turns red.
Mute Mix Output
Press and hold the knob while in
MASTER
turns red.
Bypass Input EQ
Press and hold the input channel knob while in
channel status LED turns amber.
Bypass Output Limiter
Press and hold the knob while in
MASTER
LED turns amber.
6
gain
low cut
gain
hi shelf
low cut
ch. meter
hi shelf
ch. meter
gain
1 2 3 4 5
SCM820
low cut
4 5 6 7 8
HEADPHONE
hi shelf
push to solo | hold to mute
ch. meter
gain
push to solo | hold to mute
Mode
low cut gain
low cut hi shelf
Selector
ch. meter
gain
hi shelf
low cut
ch. meter
hi shelf
gain
ch. meter
low cut
hi shelf
ch. meter
gain
low cut
gain
hi shelf
low cut
ch. meter
hi shelf
gain
ch. meter
low cut
hi shelf
gain
gain
ch. meter
low cut
low cut
gain
hi shelf
hi shelf
low cut
ch. meter
ch. meter gain
hi shelf
low cut
ch. meter
hi shelf
ch. meter
gain
low cut
gain
hi shelf
low cut
ch. meter
hi shelf
gain
ch. meter
low cut
hi shelf
gain
ch. meter
gain
low cut
low cut
hi shelf
hi shelf gain
ch. meter
gain
low cut
ch. meter
low cut
hi shelf
hi shelf
ch. meter
ch. meter
gain
low cut
gain
hi shelf
low cut
ch. meter
)
hi shelf
gain
ch. meter
low cut
hi shelf
gain
ch. meter
low cut
gain
hi shelf
low cut
ch. meter gain
gain
hi shelf
low cut
low cut
ch. meter
hi shelf
)
ch. meter hi shelf
ch. meter
gain
ch. meter
low cut
hi shelf gain
ch. meter low cut
gain
1 2 3 hi shelf
low cut
ch. meter
hi shelf
ch. meter
gain
low cut
MASTER
hi shelf
gain
ch. meter
low cut
MASTER
hi shelf
ch. meter
gain
low cut
hi shelf
ch. meter
-∞ dB
-∞ dB
gain
-∞ dB
low cut
hi shelf
MASTER
ch. meter
-24 dBFS
-∞ dB MASTER
-24 dBFS
-∞ dB
-50 dBFS
-50 dBFS
-50 dBFS
-∞ dB
-50 dBFS
or
-∞ dB
gain ch. meter
-50 dBFS
mode. The mix status LED
gain
-50 dBFS
or
low cut hi shelf
-50 dBFS
mode. The mix status
limiter

Operating the Mixer

+0 dB
+0 dB

Monitoring

-∞ dB +18 dB
Headphone Output
-∞ dB +18 dB
Use the front panel headphone jack for monitoring
+0 dB
audio. By default, the headphones monitor the mix pre-
fader/post-EQ (change to post-fader/post-limiter from
For Mix
+0 dB
92 Hz
GUI > Preferences Tab).
Outputs
-∞ dB +18 dB
92 Hz
Solo to Headphones
A channel can be soloed to the headphone jack.
-∞ dB +18 dB +0 dB
Solo Channel: Press a channel knob to solo that channel to the
25 Hz 320 Hz
92 Hz headphones. The other LED rings dim to highlight the soloed channel.
25 Hz 320 Hz
Exit Solo: Press the soloed channel knob or press the
+0 dB
-∞ dB +18 dB
return the mix to the headphones.
92 Hz
+0 dB
25 Hz 320 Hz
+0 dB
+0 dB
-∞ dB +18 dB
Input Meters
92 Hz
25 Hz 320 Hz
The front panel channel meters can be set to display real-time signal
information. Use the front panel mode selection button to scroll to the
-12 dB +12 dB
-∞ dB +0 dB +18 dB
desired mode:
-12 dB 92 Hz +12 dB
25 Hz 320 Hz
+0 dB
-12 dB +12 dB
92 Hz
25 Hz 320 Hz
-16 dBFS Input Signal Level
+0 dB
-12 dB +12 dB
The channel meter mode (
-16 dBFS
level for each channel.
25 Hz 320 Hz
IntelliMix Gain
-60 dBFS 0 dBFS
-16 dBFS
+0 dB
The IntelliMix meter mode (
-12 dB +12 dB
-60 dBFS 0 dBFS
IntelliMix gain operation in real-time across the channel LEDs. Channels
-16 dBFS
that gate open will display more gain than channels that are closed
-60 dBFS 0 dBFS
+0 dB
(attenuated) in the mix.
-12 dB +12 dB
-15 dB
-15 dB
-60 dBFS 0 dBFS
-16 dBFS
-15 dB
-12 dB +12 dB
Output Meters
-80 dB 0 dB
-60 dBFS -16 dBFS 0 dBFS
-15 dB
The output meters indicate the level of each mix
-80 dB 0 dB
4 5 6
before the digital-to-analog conversion. By default,
-80 dB 0 dB
the meter displays average and peak audio levels.
-16 dBFS
-60 dBFS 0 dBFS
It is good practice to use −18 dBFS on the SCM820
-15 dB
-80 dB 0 dB
meter as an approximation of 0 VU on an analog
push to solo | hold to mute A B
meter.
+0 dB
MASTER
-60 dBFS 0 dBFS A B
+0 dB
A B
-15 dB
+0 dB
gain
-80 dB 0 dB
limiter
MASTER
gain
Red (7)
A B
gain
+18 dB limiter
+0 dB
limiter
-15 dB
Yellow (6)
+18 dB
-80 dB 0 dB
+18 dB
gain
Yellow (5)
MASTER
limiter
A B
A B
Green (4)
+18 dB +0 dB
MASTER
-80 dB 0 dB
A B
A B
-24 dBFS
Green (3)
MASTER
gain
limiter gain
MASTER A B
Green (2)
+0 dB limiter
A B
gain
-24 dBFS +18 dB
gain
-2 dBFS limiter Green (1)
limiter
MASTER
gain
-2 dBFS
-2 dBFS
limiter
A B
gain
MASTER
+0 dB
limiter
+18 dB
A B
-24 dBFS
-2 dBFS
gain
limiter
MASTER
gain
mode. The
+18 dB
Changing the Metering Type
limiter
A B
-24 dBFS
-2 dBFS
Go to the Preferences tab of the GUI to change the following metering
MASTER options:
gain
limiter A B
-24 dBFS
• Meter Type: Change the input and output meters from displaying VU +
-2 dBFS
Peak (default) to VU or Peak.
gain
• IntelliMix Gain Metering: The Input tab of the GUI can display input
mode. The
limiter
signal level (default) or IntelliMix gain metering in realtime.
-2 dBFS
IntelliMix®
1 2 3 4 5
) displays real-time audio input signal
ch. meter
and
gain ch. meter
7 8
LED Description
Clip
Normal peaks
Signal Present
knob to
Master
6 7 8
illuminated) displays
Signal Level (dBFS)
0 to -6
-6 to -9
-9 to -18
-18 to -24
-24 to -36
-36 to -48
-48 to -60