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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.

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SCM820

SCM820-DAN

SCM820-DB25

SCM820-DAN-DB25

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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

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.

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.

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.

DFR and Audio Processing

The SCM820 features two channels of Digital Feedback Reducer (DFR). 

DFR uses Shure’s patented Adaptive Notch Filter algorithm to detect 

feedback and deploy up to 16 narrow-band notch filters, dramatically 

improving gain-before-feedback in a sound reinforcement system. DFR can 

be applied to any two channels of the SCM820, including the mix outputs.
Additionally, the mixer provides adjustable input equalization, limiting and a 

parametric output EQ to optimize the sound in any application.

Networking

Dante

TM

 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. 

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

Description

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.

Содержание SCM820-DAN

Страница 1: ...USER GUIDE 27A20290 Rev 4 2017 Shure Incorporated SCM820 Digital IntelliMix Automatic Mixer...

Страница 2: ...r 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 source...

Страница 3: ...de 11 Single or Dual Mixer Operation 11 Networking 12 Network Overview 12 Digital Audio Networking 12 Dante Software by Audinate 14 Dante Controller 14 Dante Virtual Soundcard 14 Application Examples...

Страница 4: ...uting 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...

Страница 5: ...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 Mix Status In...

Страница 6: ...nal path See Configuring the Inputs and Outputs for details on direct output routing Chassis Ground Screw 1 8 Provides an optional connection for microphone shield wire to chassis ground IntelliMix Se...

Страница 7: ...B 9 18 24 36 48 60 0 gain limiter L R SUM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE IntelliMix SCM820 AUX IN MASTER lockout power ethernet network audio autom...

Страница 8: ...i i i i i i i i i i i gain low cut hi shelf ch meter iiii i i i i i i i i i i i i i i i i gain low cut hi shelf ch meter iiii i i i i i i i i i i i i i i i i iiii i i i i i i i i i i i i i i i i 320 H...

Страница 9: ...UM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE IntelliMix SCM820 AUX IN MASTER lockout power ethernet network audio automix link dual mixer LIM A B 9 18 24 36 4...

Страница 10: ...ix link dual mixer LIM A B 9 18 24 36 48 60 0 gain limiter L R SUM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE 4 5 OUT L R mix a mix b AUX IN 7 gate IN mute ovr...

Страница 11: ...t the signal by 12 dB at 5 kHz with a slop of 12dB octave Direct and Mix Outputs Assign the Direct Outputs GUI Only Assign the Direct Output for each channel from the Output tab of the GUI Pre EQ Afte...

Страница 12: ...ssic Shure SCM810 automixer in its default settings It is renowned for fast acting seamless channel gating and consistent perceived ambient sound levels The Classic mode excels in most applications sp...

Страница 13: ...er operation by pressing the Dual Mixer button on the back panel or from GUI IntelliMix Tab Example Dual Mixer Applications Set Mix A to Classic mode for sound reinforcement and set Mix B to Smooth fo...

Страница 14: ...rements To network SCM820 mixers ensure the setup meets the following requirements Use shielded Cat5e cables or higher Cable runs limited to 100 m 328 ft Devices are on the same subnet Dante Network I...

Страница 15: ...60 0 gain limiter L R SUM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE IntelliMix SCM820 AUX IN MASTER lockout power ethernet network audio automix link dual mi...

Страница 16: ...ing guidelines Ensure the router has QoS enabled Latency settings are set to at least 1 ms Caution Do not form Link groups on a 100Mbps network as this will cause increased traffic and will exceed the...

Страница 17: ...channels appear at the mixer s Mix Outputs Aux Channel The aux channel can be set to Local or Global from GUI Inputs Tab Local Aux keeps the Aux signal from appearing on the mix output of other networ...

Страница 18: ...the chairperson s microphone activates all other microphones mute automatically Remote Channel Open Indicators Remote indicators can be used to indicate when a talker s microphone is on Connect the LE...

Страница 19: ...nt the system still has insufficient gain before feedback other changes must be made to the sound system such as changing the placement of the microphones and or loudspeakers There are two basic ways...

Страница 20: ...d held microphones In this situation feedback frequencies change drastically as the microphone user wanders the room or sound stage Both fixed and dynamic filters will automatically deepen as addition...

Страница 21: ...s set the device password assign metering type and engage hardware lockout 2 Device List Displays the name of the mixer as set in the Preferences tab Click the drop down bar and select a device to ope...

Страница 22: ...two indicators illuminate green when the channel is open to that mix bus Mix A or Mix B When set to Dual Mixer the A and B indicators function separately for each mix 9 Clip Indicator Illuminates when...

Страница 23: ...Tab 6 Routing Routes the channel to the Mix A or Mix B output The routing options depend on the Mixer Type Single Mixer Type the channel can route to both or neither mixes Dual Mixer Type the channel...

Страница 24: ...enuation Last Mic Lock On and NOMA are disabled in this setting 18 Off Attenuation Sets the amount of attenuation applied to closed channels This is disabled when the Gain Scaling is set to Adaptive 1...

Страница 25: ...lect High Q default or Low Q from the drop down menu High Q 1 70th octave Q 101 Low Q 1 40 octave Q 58 10 New Filter Q This selection designates the width of each new filter as it is deployed by DFR 1...

Страница 26: ...70 octave or 100 99Q to very wide 4 octaves or 0 27 Q Gain Sets boost or cut of the EQ setting from 18 to 18 dB 8 DFR Enable Disable Button When DFR is assigned from the DFR tab an enable disable butt...

Страница 27: ...Auto Link enabled When a device is placed in a group it will automatically configure the unit to the group s settings 3 Stand Alone Devices List Displays all mixers that function independently of a l...

Страница 28: ...der This is post limiter for the mix adjustments 9 IntelliMix Metering Changes the GUI Input meters to display IntelliMix attenuation applied in realtime as displayed with an orange meter Channels tha...

Страница 29: ...rm 3 Select Apply to set the password Once a password is set any user can log on as a Guest to view the GUI without changing settings To clear a password and allow anyone full editing rights 1 Log on...

Страница 30: ...he GUI 4 Language Sets the language of the GUI This setting is saved to the computer s cookies Event Log The event log provides a detailed account of mixer activity from the moment the mixer is powere...

Страница 31: ...that five or less windows are open to the same GUI Disable software meters from GUI Preferences tab See Network section for properly setting up the network Network Audio and Link Groups Problem Indica...

Страница 32: ...Error Messages An error message is generated on the Channel LED rings when operating or environmental conditions occur that could potentially harm the mixer These types of messages indicate the mixer...

Страница 33: ...utput Level Impedance Balanced 150 20 dBV Headphone Output 6 35 mm 1 4 TRS 100 mW 350 dual mono will drive stereo phones Digital Signal Processing AD DA Converter 24 bit 48 kHz 113 dB dynamic range ty...

Страница 34: ...n 5353 udp mDNS Required for device discovery Open 5568 udp SDT Required for inter device communication Open 8023 tcp Telnet Debug console interface Password 8180 tcp Flash Required for web GUI Open 8...

Страница 35: ...tom dual mixer 0dB mic 30dB mic phm 48 VDC CH 46dB reset CHANNEL INTELLIMIX B CC B 0E DD AA 00 auto link gate IN Aux Out mute ovrd gnd L R L 1 14 25 13 R GATE OUT LOGIC GROUND MUTE IN OR OVERRIDE IN 1...

Страница 36: ...ompleks Harco Mangga Dua Blok L No 35 Jakarta Pusat I 16 GSI31 00501 0211 Europe Middle East Africa Shure Europe GmbH Jakob Dieffenbacher Str 12 75031 Eppingen Germany Phone 49 7262 92490 Fax 49 7262...

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