background image

10

Setting IntelliMix

The SCM820 uses IntelliMix to select channels to open in a mix, while attenuating the gain of closed channels. IntelliMix is available in three presets and 

can be customized to excel in any application where multiple microphones are used at once. In all modes (except Manual), 

MaxBus 

ensures that only one 

channel is opened per sound source. 

Channel Gain in Classic Mixer

1 Talker

Full gain is applied as the 

channel opens; off attenuation 

gain is applied to all channels.

2+ Talkers

As additional channels open, 

NOMA factor decreases the 

level of all channels.

Smooth

Smooth dynamically balances system gain between open and closed 

channels. The system gain remains consistent by distributing gain across 

channels to equal one open channel. It incorporates IntelliMix operating 

principles into a gain sharing mixing style, making it ideal for broadcast and 

recording applications.

Gating Style: 

Relative

Gain Scaling: 

Adaptive

Off Attenuation: 

Disabled

Last Mic Lock On: 

Disabled

Tip: 

Unroute all unused channels to the mix bus. This will ensure the 

most consistent noise floor in Smooth mode. 

Channel Gain in Smooth Mixer

1 Talker

Relative gain is applied to the 

open channel; all channels 

adaptively attenuate to maintain 

system gain.

2+ Talkers

As additional channels open, 

gain is adaptively distributed 

across all channels to 

maintain system gain.

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

Mixer Mode Descriptions

The SCM820 features five mix modes: Classic, Extreme, Smooth, Custom or Manual.

Classic

Classic mode emulates the classic 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, specifically sound reinforcement and teleconferencing.

Gating Style:

Full

Gain Scaling:

Fixed

Off Attenuation:

−15 dB

Last Mic Lock On:

Enabled

Extreme

Extreme is an aggressive variation of the Classic mode, configured to 

achieve maximum gain before feedback by completely attenuating closed 

channels. Only open channels add to the system levels and ambient sound. 

Extreme mode is designed for sound reinforcement applications.

Gating Style: 

Full

Gain Scaling: 

Fixed

Off Attenuation: 

−110 dB

Last Mic Lock On: 

Disabled

Channel Gain in Extreme Mixer

1 Talker

Full gain is applied to the 

open channel. Closed 

channels are fully attenuated.

2+ Talkers

As additional channels open, 

NOMA factor decreases the 

level of all channels.

Manual

Manual mode deactivates IntelliMix to allow the SCM820 to operate as a 

standard mixer. All Channel Status LEDs remain on in this mode to indicate 

there is no IntelliMix attenuation. Channel and mix equalization, output 

limiter and mix bus routing are still active in this setting. 

Tip: 

Be careful when switching to Manual mode, as all microphones will 

gate open to full gain, which may result in feedback. 

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

-15 dB

Custom

Custom mode allows IntelliMix parameters to be fine-tuned and tailored from 

the GUI. The mixer automatically switches to Custom once a parameter 

is changed in Classic, Extreme or Smooth mode. Theses configurations 

are saved to the device and will persist after the mixer is turned off and 

restarted. Custom configurations can also be saved as a file to a computer 

and loaded onto the device for quick recall. 

Summary of Contents for SCM820-DAN

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Reviews: