Shure SCM820 Digital IntelliMix User Manual

SCM820 Digital

Automatic Mixer

IntelliMix

IMPORTANT SAFETY INSTRUCTIONS

1. READ these instructions.

2. KEEP these instructions.

3. HEED all warnings.

4. FOLLOW all instructions.

5. DO NOT use this apparatus near water.

6. CLEAN ONLY with dry cloth.

7. DO NOT block any ventilation openings. Allow sufficient distances for adequate ventilation and install in accordance with the manufacturer’s instructions.

8. DO NOT install near any heat sources such as open flames, radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not place any open flame sources on the product.

9. DO NOT defeat the safety purpose of the polarized or groundingtype plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wider blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10. PROTECT the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11. ONLY USE attachments/accessories specified by the manufacturer.

12. USE only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13. UNPLUG this apparatus during lightning storms or when unused for long periods of time.

14. REFER all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

15. DO NOT expose the apparatus to dripping and splashing. DO NOT put objects filled with liquids, such as vases, on the apparatus.

16. The MAINS plug or an appliance coupler shall remain readily operable.

17. The airborne noise of the Apparatus does not exceed 70dB (A).

18. Apparatus with CLASS I construction shall be connected to a MAINS socket outlet with a protective earthing connection.

19. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

20. Do not attempt to modify this product. Doing so could result in personal injury and/or product failure.

21. Operate this product within its specified operating temperature range.

This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit.

This symbol indicates that there are important operating and maintenance instructions in the literature accompanying this unit.

WARNING: This product contains a chemical known to the State of California to cause cancer and birth

defects or other reproductive harm.

Table of Contents

Table of Contents 1

Overview 2

IntelliMix® Operating Principles 2 Mixer Modes 2 Dual Mixer Operation 2 Audio Processing 2 Networking 2 Model Variations 2

SCM820 Description 3

Front Panel 3 Rear Panel 4

Operating the Mixer 5

Front Panel Modes 5 Audio Mute and Bypass 5 Monitoring 5

The SCM820 Graphical User Interface 6

Graphical User Interface (GUI) 6 Accessing the GUI 6

Installation 7

Rackmounting 7 Power 7 Typical Audio Connections 7 Configuring the Inputs and Outputs 8

Setting IntelliMix 9

IntelliMix Parameters 9 Mixer Mode Descriptions 9 Selecting the Mixer Mode 10 Single or Dual Mixer Operation 10

Application Examples 14

Creating a Link Group 14 Integrating with Other Systems 14 Configuring for Use with a Choir 14 Internet Calling 15 Logic 15

Troubleshooting 16

Event Log 17 Front-Panel Error Messages 17

Important Product Information 17

Information to the user 17 Patent Notice 17

Certifications 17

Signal Path Diagram 18

GUI Description 19

Navigation Bar 19 Input 20 Intellimix Tab 21 Output Tab 23 Link Group Tab 24 Preferences Tab 25 Log On Page 27

Specifications 28

Analog Connections 28 Digital Signal Processing 28 Networking 28

IP Ports and Protocols 29

Networking 11

Network Overview 11 Digital Audio Networking 11

Dante Software by Audinate 13

Dante Controller 13 Dante Virtual Soundcard 13

Furnished Accessories 29

Connector Diagrams 30

Overview

The Shure SCM820 is an 8-channel digital automatic mixer designed for use in speech applications, including sound reinforcement, broadcasting and audio recording. It dramatically improves audio quality in any application where multiple microphones are required. The mixer uses

IntelliMix

technology to select

channels to open to the mix bus, while attenuating other channels. The mixing mode is selectable to allow a range of automatic mixing styles.

IntelliMix® Operating Principles

Expanding upon Shure's classic SCM810 IntelliMix technology, the digital SCM820 delivers seamless automatic mixing by combining the following functions:

• Noise Adaptive Threshold (NAT) manages the audio system by

distinguishing between dynamic audio (such as speech) and the noise floor (such as air conditioning). It continuously adjusts the activation threshold, so that only speech levels louder than the background noise open a channel.

• MaxBus ensures that only one channel is opened per sound source,

reducing comb filtering for clear, intelligible speech.

• Number of Open Microphones Attenuation (NOMA) attenuates system

Dual Mixer Operation

The SCM820 can operate as a single or dual mixer:

Single Mixer: Channels are routed to a single mix bus that sends the same audio to both Mix A and B outputs. This allows the same program to be sent to different rooms or recording applications. Output gain, parametric equalizer and limiter can be set separately for each mix.

Dual Mixer: Two separate buses provide independent automixes for each mix output. This allows two entirely different mixes to result from the same set of inputs. This is useful when the mixer is being used for two applications. For example, set Mix A to Classic mode for sound reinforcement, and set Mix B to Smooth for a broadcast feed. As a dual mixer, channels can be routed to Mix A, Mix B, Mix A and B, or neither mix bus.

gain as additional channels are opened, providing consistent output levels and better gain before feedback.

• Maintains the perceived ambient sound to achieve a natural sounding audio program even during long pauses in conversation.

Audio Processing

The mixer provides adjustable input equalization, limiting and a parametric output EQ (from the GUI) to optimize the sound for a given application.

Mixer Modes

The mixer operates in one of five Mix Modes: Classic, Smooth, Extreme, Custom or Manual. The first three are factory settings that offer a range of reliable automixing styles. IntelliMix is configurable in Custom mode and turned off in Manual mode.

Classic

Classic mode emulates the default settings of the classic Shure SCM810 automixer. It is renowned for fast-acting, seamless channel gating and consistent perceived ambient sound levels.

Smooth

Smooth mode dynamically balances system gain between open and closed channels. The system gain remains consistent by distributing gain across channels to equal one open channel. This mode incorporates IntelliMix operating principles into a gain sharing mixing style.

Extreme

Extreme is an aggressive variation of Classic mode, configured to achieve maximum gain before feedback by completely attenuating closed channels.

Custom

Custom mode allows individual IntelliMix parameters to be fine-tuned and tailored from the GUI.

Manual

Manual mode deactivates IntelliMix to operate as a standard mixer. Channel and mix equalization, output limiter and mix bus routing are still active in this setting.

Networking

DanteTM Digital Audio

Digital audio is carried over standard Ethernet using shielded Cat5e (or higher) cables. Dante provides low latency, tight clock synchronization, and high Quality-of-Service (QoS) to provide reliable audio transport to a variety of Dante devices. Dante audio can coexist safely on the same network as IT and control data, or can be configured to use a dedicated network.

Audio can be played or recorded to a PC or Mac using Dante Virtual Soundcard (DVS), using the computer’s standard Ethernet connection. A license of DVS is included with every SCM820-DAN.

Remote Control

The SCM820 can connect to a computer or 3rd party control system (AMX, Crestron) for remote control and monitoring. The web browser-based graphical user interface (GUI) enables custom IntelliMix configuration and access to additional features.

Linking Mixers

SCM820-DAN mixers can be linked to form large automixes of up to 12 units (96 channels of audio). Mixers in the same link group operate under shared IntelliMix settings. A back-panel auto link button enables mixers to automatically link when they join the network. To link specific mixers, custom groups can be created and managed from the GUI.

Model Variations

The following table describes the four SCM820 model variations:

Model

Connector Type Network Card

SCM820 Block Standard Ethernet

SCM820-DAN Block Dante Digital Audio

SCM820-DB25 DB25 Standard Ethernet

SCM820-DAN-DB25 DB25 Dante Digital Audio

Upgrading to Dante

A standard SCM820 can be upgraded with the Dante Network Interface Card (A820-NIC-DAN) to add full digital audio networking capabilities. This replaces the standard Ethernet port with two Dante network ports. This should only be installed by qualified service personnel. Visit www.shure.com for more details.

Description

SCM820

SCM820-DAN

SCM820-DB25

SCM820-DAN-DB25

INTELLIMIX

AUX IN

OUT

mix a

mix b

OUT mix a

mix b

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

direct out

AUX IN

gateINmute

ovrd

gnd

direct out

MIX OUTPUTS

MIX A

MIX B

gnd

direct out

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

direct out

AUX IN

INPUTS 1-8

L +R SUM

AUX IN

INPUTS 1-8

L +R SUM

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

direct out

gateINmute

direct out

ovrd

direct out

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

direct out

DIRECT OUTPUTS 1-8

CHANNEL

line

manual

gnd

gateINmute

ovrd

gnd

+0dB mic

smooth

+30dB mic

classic

+46dB

extreme

custom

phm 48 VDC

lockout

dual mixer

direct out

INTELLIMIX

manual

gnd

gateINmute

ovrd

gnd

smooth classic extreme

custom

dual mixer

direct out

INTELLIMIX

manual smooth classic extreme custom

dual mixer

INTELLIMIX

manual smooth classic extreme custom

dual mixer

reset

auto link

CHANNEL

line

+0dB mic +30dB mic +46dB

phm 48 VDC auto link

CHANNEL

line

+0dB mic +30dB mic +46dB

phm 48 VDC auto link

CHANNEL

line

+0dB mic +30dB mic +46dB

phm 48 VDC auto link

00:0E:DD:AA:BB:CC

secondary

primary

lockout

reset

00:0E:DD:AA:BB:CC

lockout

reset

00:0E:DD:AA:BB:CC

secondary

primary

lockout

reset

00:0E:DD:AA:BB:CC

SCM820 Description

④

SCM820

1 2 3 4 5 6 7 8

gain low cut hi shelf

meter

push to solo | hold to mute

①

②

③ ⑦

Front Panel

① Channel Mode Selection

Press the button to select the function of the channel knobs and monitor LED rings. See the Audio Signal Adjustment section for details on each mode.

② Assignable Channel Knob

Adjusts settings and status for each input:

Rotate: Adjusts a setting. Momentary Press: Solos the channel to the headphone output. Press and Hold: Mutes the audio or bypasses the EQ setting.

③ Monitor LED Ring

13 LED segments display gain setting, input signal meter, IntelliMix gain meter, channel solo, or EQ setting.

④ Channel Status LED

LED Channel Status

Off Channel is closed (attenuated in the automix).

Green Channel is open (selected in the automix).

Amber Channel EQ is bypassed.

Flicker Red

Solid Red Channel is muted.

⑤ Auxiliary Input Jack (1/8")

Unbalanced aux input sums left and right channels to mono. Front and back panel aux inputs are summed to a mono signal and routed without automixing to the mix outputs.

⑥ Master Output Knob

Adjusts settings and status of the mix outputs. See Front Panel Modes for details.

Rotate:

Adjusts output gain or limiter threshold.

Momentary Press: Overrides a soloed channel to return the mix to the

headphone output.

Press and Hold: Mutes the audio or bypasses the limiter.

⑦ Master LED Ring

Displays gain setting or limiter threshold. A single LED represents each mixer when they are both selected but set to different levels.

⑧ Master Mode Selection

Selects the function (gain or limiter) of the master knob and LED ring.

⑨ Mix Select Button

Selects Mix A, Mix B, or both for adjustment with the master knob and monitoring on the LED ring and headphone output. Note: When both Mix A and Mix B are selected, the headphone output only monitors Mix A.

Signal is clipping. Set the channel to a lower input gain level.

⑤

AUX IN

L+R SUM

⑥

MASTER

⑨

limiter

gain

⑫

LIM

A B

-9

-18

-24

-36

-48

-60

⑧⑩⑪

⑬

IntelliMix

power

ethernet

network audio automix link dual mixer

lockout

⑭

HEADPHONE

⑮

⑩ Mix Status Indicator

LED Mix Status

Green

Mix is selected for adjustment and listening on the headphone output.

Amber Limiter is bypassed.

Red Mix is muted.

⑪ Audio Output Meters

Monitor the output signal level and limiter threshold for mix A and B.

⑫

LIM (Limiter) LEDs

Illuminate amber when the audio levels exceed the limiter threshold.

⑬ System Status Indicators

The LEDs illuminate to indicate system settings:

LED Color Status

power Green Unit is powered on. ethernet Green Unit is connected to a network.

All connected receive channels

Green

are OK (receiving digital audio as expected).

One or more connected receive channels experiencing a subscription

network audio

Flashing Green

error or is unresolved (transmitting device is off, disconnected, renamed or has incorrect network setting).

Red Clock synchronization problem.

No receive channels connected (routing has not been established).

Two or more mixers are connected in a link group.

automix link

Off

Green

Flashing Green Link Group is configuring.

Off Mixer is in standalone mode.

dual mixer

Green Mixer is set to Dual Mixer operation.

Off Mixer is set to Single Mixer operation.

Red Front panel controls are locked.

lockout

Flashing Red

An adjustment is attempted in lockout mode.

⑭ Headphone Volume Knob

Adjust the volume of the headphone output.

⑮ Headphone Output Jack (1/4 in.)

Monitor a mix or a soloed channel.

①

②

① ②

③ ④ ⑦⑥

OUT mix a

mix b

AUX IN

⑤

MIX A

gateINmute

MIX OUTPUTS

ovrd

gnd

direct out

gateINmute

MIX B

ovrd

gnd

gateINmute

ovrd

direct out

AUX IN

L +R SUM

direct out

③

Rear Panel

① Power Switch

Turns the unit on or off.

② AC Power Jack

Supplies AC power to the mixer when plugged into a power source.

gnd

④

direct out

gateINmute

ovrd

gnd

direct out

INPUTS 1-8

⑤ ⑥

INTELLIMIX

CHANNEL

gateINmute

ovrd

gnd

direct out

gateINmute

ovrd

gnd

direct out

gateINmute

ovrd

gnd

direct out

manual

gateINmute

ovrd

gnd

smooth classic extreme custom

dual mixer

line

+0dB mic

+30dB mic +46dB

phm 48 VDC

lockout

auto link

reset

00:0E:DD:AA:BB:CC

⑭ ⑮

INTELLIMIX

CHANNEL

DIRECT OUTPUTS 1-8

manual smooth classic extreme custom

dual mixer

line

+0dB mic

+30dB mic +46dB

phm 48 VDC auto link

secondary

primary

lockout

reset

00:0E:DD:AA:BB:CC

⑭ ⑮

⑧

INTELLIMIX

manual smooth classic extreme custom

dual mixer

⑨

⑩

CHANNEL

⑫ ⑬

⑪

line +0dB

mic +30dB

mic +46dB

phm 48 VDC auto link

⑰

secondary

⑱

⑰

⑯

primary

⑱

③ Mix A and Mix B Outputs

Active balanced outputs connect to amplifiers, DSP, mixer, or recording device.

④ Auxiliary Input Jack

Unbalanced aux input sums left and right channels to mono. Front and back panel aux inputs are summed to a mono signal and routed without automixing to the mix outputs.

⑤ Channel Inputs 1–8

Active-balanced microphone- or line-level inputs.

Block Connectors

: Audio +

: Audio −

: Audio ground

gate: Logic gate out mute: Logic mute in ovrd: Logic override in gnd: Logic ground

DB25 Connector Pins: Audio plus, audio negative and audio ground. See Specifications

for details.

⑥ Direct Outputs 1–8

Each channel has a dedicated, impedance-balanced direct output on the back panel that can be selected from one of five stages in the signal path. See Configuring the Inputs and Outputs for details on direct output routing.

⑦ Chassis Ground Screw 1–8

Provides an optional connection for microphone shield wire to chassis ground.

⑧ IntelliMix Select Buttons

Scrolls through IntelliMix presets for each mix output. When

dual mixer is

off, the A button sets the mode for both Mix A and Mix B.

⑪ Input Gain Selection and LED Indicator

Sets the analog input gain level for the selected channel(s), illuminating the green LED. All LEDs are off when the channel's audio source is set to Network from the GUI.

⑫ Phantom Power Button and LED Indicator

Supplies 48 VDC phantom power to the selected channel(s), illuminating the green LED. Phantom Power is disabled in the line (+0dB) gain setting.

⑬ Auto Link Button and LED Indicator

Enables networked SCM820-DAN mixers to automatically form a link group. Link Groups enable a larger audio mix by incorporating inputs from two or more mixers. See Link Groups for more details.

⑭ Lockout Button and LED Indicator

Hold for five seconds to disable front and back panel controls. The front

lockout LED illuminates red (flashing red during an adjustment

panel attempt) and the back panel channel display shows L.

⑮ Reset Button

Press and hold for five seconds to reboot the mixer with default system settings restored.

⑯ Network Ports

RJ-45 jacks for network connection.

⑰ Network Status LED (Green)

Off = no network link On = network link established Flashing = network link active

⑱ Network Speed LED (Amber)

SCM820:

Off = 10 Mbps On = 100 Mbps

⑨ Dual Mixer Button

Sets the SCM820 as a dual mixer, indicated by the green LED.

⑩ Channel Select Button and Display

Press to select a single channel (1–8) or all channels (A) when changing input gain or phantom power.

• When all channels are selected (A), Input Level and Phantom Power LED indicators only illuminate if all channels have the same setting.

• L is displayed when the mixer is in lockout mode.

SCM820-DAN:

Off = 10/100 Mbps On = 1 Gbps

gain

low cut

hi shelf

ch. meter

-∞ dB +18 dB

+0 dB

gain

low cut

hi shelf

ch. meter

gain

low cut

hi shelf

ch. meter

gain low cut

hi shelf

ch. meter

gain low cut

hi shelf

ch. meter

320 Hz25 Hz

92 Hz

-60 dBFS 0 dBFS

-∞ dB +18 dB

+0 dB

+12 dB-12 dB

+0 dB

-16 dBFS

gain

low cut

hi shelf

ch. meter

gain

low cut

hi shelf

ch. meter

gain low cut

hi shelf

ch. meter

gain low cut

hi shelf

ch. meter

320 Hz25 Hz

92 Hz

-60 dBFS 0 dBFS

-∞ dB +18 dB

+0 dB

+12 dB-12 dB

+0 dB

-16 dBFS

gain

low cut

hi shelf

ch. meter

-80 dB 0 dB

-15 dB

gain

low cut

hi shelf

ch. meter

gain

low cut

hi shelf

ch. meter

gain low cut

hi shelf

ch. meter

320 Hz25 Hz

92 Hz

-∞ dB +18 dB

+0 dB

+12 dB-12 dB

+0 dB

gain

low cut

hi shelf

ch. meter

gain

low cut

hi shelf

ch. meter

320 Hz25 Hz

92 Hz

-∞ dB +18 dB

+0 dB

gain

low cut

hi shelf

gain

low cut

hi shelf

gain

low cut

hi shelf

gain

low cut

hi shelf

320 Hz25 Hz

92 Hz

-2 dBFS-50 dBFS

-24 dBFS

-60 dBFS 0 dBFS

-∞ dB +18 dB

+0 dB

+12 dB-12 dB

+0 dB

MASTER

gain

A B

limiter

MASTER

gain

A B

limiter

-16 dBFS

gain

low cut

hi shelf

-80 dB 0 dB

-15 dB

gain

320 Hz25 Hz

92 Hz

-60 dBFS 0 dBFS

-∞ dB +18 dB

+0 dB

+12 dB-12 dB

+0 dB

MASTER

gain

A B

limiter

-16 dBFS

gain

-80 dB 0 dB

-15 dB

Operating the Mixer

AUX IN

MASTER

lockout

power

ethernet

network audio

automix link

dual mixer

LIM

-9

-18

-24

-36

-48

-60

gain

limiter

L+R SUM

gain

low cut

hi shelf

meter

push to solo | hold to mute

1234567

HEADPHONE

IntelliMix®

SCM820

gain low cut hi shelf

meter

push to solo | hold to mute

1 2 3 4 5

IntelliMix®

MASTER

LIM

-9

-18

-24

-36

-48

-60

gain

limiter

A B

lockout

power ethernet network audio automix link dual mixer

HEADPHONE

SCM820

Front Panel Modes

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 (

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 (

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 (

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 (

LEDs display the IntelliMix attenuation applied in realtime. Channel gain is adjustable in this 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 (

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 gain or ch. meter mode. The channel status LED turns red.

Mute Mix Output

Press and hold the 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 LED turns amber.

low cut)

hi shelf)

ch. meter)

gain and ch. meter)

limiter)

MASTER knob while in gain mode. The mix status LED

MASTER knob while in limiter mode. The mix status

Mode

Selector

low cut or hi shelf mode. The

For Mix

Outputs

Monitoring

Headphone Output

Use the front panel headphone jack for monitoring audio. By default, the headphones monitor the mix prefader/post-EQ (change to post-fader/post-limiter from

GUI > Preferences Tab).

Solo to Headphones

A channel can be soloed to the headphone jack.

Solo Channel: Press a channel knob to solo that channel to the headphones. The other LED rings dim to highlight the soloed channel.

Exit Solo: Press the soloed channel knob or press the return the mix to the headphones.

Input Meters

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 desired mode:

IntelliMix®

1 2 3 4 5 6 7 8

gain low cut hi shelf

meter

Input Signal Level

The channel meter mode (

ch. meter) displays real-time audio input signal

level for each channel.

IntelliMix Gain

The IntelliMix meter mode (

gain and ch. meter illuminated) displays

IntelliMix gain operation in real-time across the channel LEDs. Channels that gate open will display more gain than channels that are closed (attenuated) in the mix.

Output Meters

The output meters indicate the level of each mix before the digital-to-analog conversion. By default, the meter displays average and peak audio levels.

It is good practice to use −18 dBFS on the SCM820

meter as an approximation of 0 VU on an analog meter.

LED Description Signal Level (dBFS)

Red (7) Clip 0 to -6

Yellow (6)

Yellow (5) -9 to -18

Normal peaks

Green (4)

Green (3) -24 to -36

Green (2) -36 to -48

Signal Present

Green (1) -48 to -60

Changing the Metering Type

Go to the Preferences tab of the GUI to change the following metering options:

• Meter Type: Change the input and output meters from displaying VU + Peak (default) to VU or Peak.

• IntelliMix Gain Metering: The Input tab of the GUI can display input signal level (default) or IntelliMix gain metering in realtime.

MASTER

-6 to -9

-18 to -24

Master knob to

AUX IN

L+R SUM

LIM

A B

-18

-24

gain

-36

limiter

-48

-60

-9

The SCM820 Graphical User Interface

reset

primary

00:0E:DD:AA:BB:CC

SCM820-Dan-ffeee5.local 192.168.200.22

Graphical User Interface (GUI)

The SCM820 graphical user interface (GUI) enables comprehensive control of the mixer from a web browser. The GUI is hosted from a webserver embedded on the SCM820, and is accessible from any computer on the network. Use the GUI for the following functions:

• Manage mixers from a remote location.

• Customize IntelliMix parameters.

• Form large automixes with custom link groups.

• Assign the direct outputs in the signal path.

• Configure Redundant or Split networks.

Accessing the GUI

The Shure Web Server Discovery application finds all Shure devices on the network that feature a web-based GUI. Follow these steps to install the software and access the SCM820 GUI:

① Install the Shure Discovery application

Load the Shure USB drive and install the application. This automatically installs the required Bonjour device discovery tool on the computer. This application is also available from www.shure.com.

System Requirements

• Windows: Windows XP (32 and 64 bit), Windows Vista and Windows 7

• Apple: Mac OSX 10.6.0 and higher

• Latest version of Adobe Flash Player

• Bonjour software (bundled with the Shure Discovery app)

• The GUI is supported on the following web-browsers: Internet Explorer, Firefox, Safari and Chrome.

② Connect the network

Ensure the computer and the mixer are on the same network.

③ Launch the Discovery application

The app displays all Shure devices that feature a GUI.

④ Open the SCM820 GUI

Double-click on a device to open its GUI in a web browser.

⑤ Bookmark the GUI (recommended)

Bookmark the device's DNS name to access the GUI without the Shure Discovery app.

Accessing the GUI without the Discovery App

If the Discovery application is not installed, the SCM820 GUI can be accessed by typing the DNS name into an internet browser. The DNS name is derived from model of the unit (SCM820 or SCM820-DAN), in combination with the last three bytes (six digits) of the MAC address, and ending in .local.

Format Example: If the MAC address of a unit is 00:0E:DD:AA:BB:CC, then the link is written as follows:

• SCM820-DAN: http://SCM820-DAN-aabbcc.local

• SCM820: http://SCM820-aabbcc.local

① ② ③

secondary primary

IntelliMix®

1 2 3 4 5 6 7 8

gain

w cut

hi shelf

push to solo | hold to mute

SCM820

LIM

MASTER

A UX IN

HEADPHONE

net

ether

k audio

-1

omix link

-2

gain

dual mi

-3

limi t

-4

L+R SUM

-6

lockout

④ ⑤

OUT

AUX IN

mix a

mix b

direct out

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

direct out

gnd

direct out

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

direct out

SCM820-DAN SCM820-Dan-ffeee5.local 192.168.200.22

ROOM 5

CONFERENCE

SCM820

SCM820-ffaaa2.local

192.168.200.23

INTELLIMIX

CHANNEL

line

manual

gateINmute

ovrd

gnd

+0dB mic

smooth

+30dB mic

classic

+46dB

extreme

secondary

custom

phm 48 VDC IntelliMix

dual mixer

direct out

Dante

primary

lockout

reset

00:0E:DD:AA:BB:CC

Inputs 1-8

Aux In

L + R

SUM

Inputs 1-8

Aux In

MIX OUTPUTS

MIX A

MIX B

L + R SUM

Inputs 1-8

Aux In

MIX B

L + R SUM

MASTER

lockout

ethe

net

k audio

aut

omix link

dual mi

LIM

-1

-2

-3

-4

-6

gain

limi

HEADPHONE

AUX IN

L+R SUM

Installation

Direct Outputs 1-8

Rackmounting

Rackmount the mixer using the screws and washers supplied in the Hardware Kit. Follow these general best practices when rackmounting equipment:

• Ambient temperature of the rack should not exceed specified operating temperature range of the device.

• Keep fan inlet and side air vents clear from obstructions and provide adequate space for airflow within the rack.

• When possible, provide 1 RU of empty space between each device.

LIM

MASTER

1 2 3 4 5 6 7 8

gain

w cut

hi shelf

gain

w cut

hi shelf

gain

w cut

hi shelf

push to solo | hold to mute

1 2 3 4 5 6 7 8

push to solo | hold to mute

1 2 3 4 5 6 7 8

push to solo | hold to mute

A UX IN

HEADPHONE

net

ethe

k audio

-1 8

omix link

-2 4

gain

dual mi

-3 6

limi t

-4 8

L+R SUM

-6 0

lockout

LIM

MASTER

A UX IN

HEADPHONE

net

ethe

k audio

-1 8

omix link

-2 4

gain

dual mi

-3 6

limi t

-4 8

L+R SUM

-6 0

lockout

LIM

MASTER

A UX IN

HEADPHONE

net

ethe

k audio

-1 8

omix link

-2 4

gain

dual mi

-3 6

limi t

-4 8

L+R SUM

-6 0

lockout

Typical Audio Connections

Power

Connect the unit to AC power using the supplied IEC cable. Turn on the power switch.

INTELLIMIX

OUT

AUX IN

mix a

mix b

direct out

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

direct out

gnd

direct out

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

gateINmute

ovrd

gnd

direct out

CHANNEL

line

manual

gateINmute

ovrd

gnd

+0dB mic

smooth

+30dB mic

classic

+46dB

extreme

direct out

secondary

custom

dual mixer

primary

phm 48 VDC

lockout

auto link

reset

00:0E:DD:AA:BB:CC

① Channel Inputs

• Microphones

• Insert send from a mixer

• Dante network audio

③ Mix Outputs

• Amplifier

• Powered speakers

• Mixer channel inputs

② Aux Inputs

Aux-level sound sources:

• MP3 player

• Computer headphone output

• CD player

④ Direct Outputs

• Insert returns to a mixer

• Recording device

• Mixer channel inputs

Configuring the Inputs and Outputs

Unless where noted, configurations can be made from the hardware or from the GUI.

Inputs

① Select the Audio Source (GUI only)

• Analog (default): Audio is from a microphone or line-level audio source connected to a channel input on the mixer back panel.

• Network: Audio is from the Dante digital audio network. Go to the Inputs tab of the GUI to select Network audio for each desired channel. Dante Controller software is required to properly route audio to the channel inputs.

② Select the Input Gain

Select the analog input gain for each channel. No gain is applied for analog line-level or when the audio source is set to Network.

• Mic (+46dB): For less sensitive microphones, such as dynamics.

• Mic (+26dB): For loud talkers or sensitive microphones such as condensers.

• Line (+0dB): For line-level sources such as mixer inserts.

③ Supply Phantom Power

Supply 48 V phantom power to the channel when using condenser microphones. (Phantom power is disabled when Input gain is set to Line.)

④ Adjust Channel EQ

Adjust the high- and low-frequency equalization to improve intelligibility and reduce undesired noise:

• Low Cut: Ideal for attenuating low-frequency vibration caused by table vibrations or air-conditioning rumble. Adjust the frequency of the 12 dB/ octave filter from 25 - 320 Hz.

• High Shelf: For tempering sibilant speech or enhancing the sound of offaxis microphones. Use this to boost or cut the signal by 12 dB at 5 kHz with a slop of 12dB/octave.

Direct and Mix Outputs

⑤ Assign the Direct Outputs (GUI Only)

Assign the Direct Output for each channel from the Output tab of the GUI.

• Pre-EQ: After the Input Gain

• Post-EQ: After the EQ blocks

• Post-Fader: After the channel fader

• IntelliMix: After the IntelliMix gating decision

• IntelliMix NOMA: After IntelliMix gating and NOMA decisions

⑥ Set Mix Output Level (GUI Only)

Set the Output level according to the input of the connecting equipment:

• Line (-0) (default): No attenuation to the output level.

• Aux (-20): The signal is attenuated 20 dB to avoid clipping a line input.

• Mic (-46): The signal is attenuated 46 dB to match a microphone input.

⑦ Set the Limiter

The output limiter prevents distortion during loud program peaks without affecting normal program levels. This prevents overloading the devices connected to the mixer outputs.

⑧ Adjust the Output Gain

Adjust the overall output level of the mix.

Auxiliary (Aux) Input

The SCM820 features two auxiliary inputs: an 1/8” jack on the front panel and a back panel input (block connector or RCA connectors, depending on the model). Each input sums the left and right channel to a mono signal. This mono signal is routed directly to the mix outputs, bypassing the automixing process. Use this input for sources such as an MP3 player or computer speaker output.

Digital Channels

When the mixer is connected to a Dante network, the left and right channels are accessible before they sum to the mono signal for the mix outputs. Use the Aux L and Aux R channels in Dante Controller to route audio to and from the aux channel.

+ 23 hidden pages

Shure SCM820 Digital IntelliMix User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual