Shure Digital IntelliMix SCM820 Manual
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Shure Digital IntelliMix SCM820 Manual

Automatic mixer
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SCM820
®
SCM820 Digital IntelliMix Automatic Mixer
The Shure digital automatic mixer, SCM820, user guide.
Version: 4.0 (2021-C)

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Summary of Contents for Shure Digital IntelliMix SCM820

  • Page 1 SCM820 ® SCM820 Digital IntelliMix Automatic Mixer The Shure digital automatic mixer, SCM820, user guide. Version: 4.0 (2021-C)

  • Page 2: Table Of Contents

    Shure Incorporated Table of Contents Networking SCM820 SCM820 Digital IntelliMix® Automatic Mixer 4 Network Overview Digital Audio Networking Overview IntelliMix® Operating Principles Dante Software by Audinate Mixer Modes Dante Controller Dual Mixer Operation Dante Virtual Soundcard DFR and Audio Processing...
  • Page 3 Shure Incorporated IMPORTANT SAFETY INSTRUCTIONS Information to the user Patent Notice Important Product Information 3/59...

  • Page 4: Scm820 Scm820 Digital Intellimix® Automatic Mixer

    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).

  • Page 5: Dual Mixer Operation

    Shure Incorporated 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.

  • Page 6: Hardware Interface

    Shure Incorporated Upgrading to Dante You can add digital networking capabilities to a standard SCM820 using the Dante Network Interface Card (A820-NIC-DAN). The card replaces the standard Ethernet port with 2 Dante network ports. This upgrade should only be installed by qualified service personnel.
  • Page 7 Shure Incorporated 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.

  • Page 8: Rear Panel

    Shure Incorporated Color Status One or more connected receive channels experiencing a sub- Flashing Green scription error or is unresolved (transmitting device is off, dis- connected, renamed or has incorrect network setting). Clock synchronization problem. No receive channels connected (routing has not been estab- lished). Green Two or more mixers are connected in a link group. automix link Flashing Green Link Group is configuring. Mixer is in standalone mode.
  • Page 9 Shure Incorporated ② AC Power Jack Supplies AC power to the mixer when plugged into a power source. 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.
  • Page 10 Shure Incorporated 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.

  • Page 11: Signal Path Diagram

    Shure Incorporated SCM820: Off = 10 Mbps On = 100 Mbps SCM820-DAN: Off = 10/100 Mbps On = 1 Gbps Signal Path Diagram The following diagram shows the audio signal path and the routing options for several features (default configuration shown).

  • Page 12: Operating The Mixer

    Shure Incorporated Mute Control ◦ Pre-IntelliMix ◦ Post-IntelliMix Direct Output Selection ◦ Pre-EQ ◦ Post-EQ ◦ Post-Fader ◦ IntelliMix ◦ IntelliMix NOMA Operating the Mixer Front Panel Modes 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.

  • Page 13: Audio Mute And Bypass

    Shure Incorporated 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.
  • Page 14 Shure Incorporated Use the front panel headphone jack for monitoring audio. By default, the headphones monitor the mix pre-fader/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.

  • Page 15: Scm820 Application

    • Form large automixes with custom link groups. • Assign the direct outputs in the signal path. • Configure redundant or split networks. • Set up Shure Digital Feedback Reducer (DFR) for up to two channels in each mixer. 15/59...

  • Page 16: System Requirements

    Follow these steps to install the software and access the SCM820 app: ① Get the Shure SCM820 application and the Shure Microflex Wireless (MXW) application Get these applications to see devices on the network and open the control interface. Download the software from www.shure.com/software.

  • Page 17: Installation

    Shure Incorporated Accessing network settings Network type Use MXW application to • Static specify network type • DHCP • Network mode Use Dante Controller to • Dante network control change • Audio settings Installation Power Connect the unit to AC power using the supplied IEC cable. Turn on the power switch.

  • Page 18: Typical Audio Connections

    Shure Incorporated Typical Audio Connections ① Channel Inputs ◦ Microphones ◦ Insert send from a mixer ◦ Dante network audio ② Aux Inputs Aux-level sound sources: ◦ MP3 player ◦ Computer headphone output ◦ CD player ③ Mix Outputs ◦...

  • Page 19: Configuring The Inputs And Outputs

    Shure Incorporated 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 • Analog (default): Audio is from a microphone or line-level audio source connected to a channel input on the mixer back panel.
  • Page 20 Shure Incorporated Hardware Adjustments Channel Selection To adjust the Input Gain or Phantom Power, press the CH to scroll to A for All channels, or select a single channel. Channel Mode Selector Select a mode to adjust gain or EQ settings.
  • Page 21 Shure Incorporated GUI Adjustments Input Tab 21/59...
  • Page 22 Shure Incorporated Output Tab 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 ◦...

  • Page 23: Setting Intellimix

    The SCM820 features five mix modes: Classic (Default), 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.
  • Page 24 Shure Incorporated 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 distrib- uting 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.
  • Page 25 Shure Incorporated 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.

  • Page 26: Intellimix Parameters

    Shure Incorporated IntelliMix Parameters Gating Style Determines the way gain is applied to open channels. Full Channels open at full gain (as adjusted by the NOMA factor). Channels open at a gain level that varies with the input signal level—quieter signals receive  Relative less gain than loud signals. As the input signal level increases, more gain is applied to the channel.

  • Page 27: Single Or Dual Mixer Operation

    Shure Incorporated Single or Dual Mixer Operation The mixer can be set to perform one or two automixes: • Single Mixer (default): Channels are routed to a single mix bus that sends the same audio to both Mix A and B outputs.

  • Page 28: Network Overview

    Shure Incorporated Network Overview For most installations, the SCM820 can connect to a computer either directly or though a network switch ("Link-Local" connec- tions). Connect multiple mixers to a switch in a star configuration to ensure reliable networking (each unit connects directly to the switch). In some cases, computer settings or programs may interfere with the network. The majority of these connection issues can be solved by using a DHCP-enabled router*.

  • Page 29: Digital Audio Networking

    Link mixers to expand the audio mix, enabling the addition of up to 12 mixers (96 channels). • Protect the audio signal with a redundant audio network. • Isolate Dante audio from the Shure Control network. • Record audio to a computer without additional hardware. •...
  • Page 30 Data Transport in each Mode The following table displays the configuration of the Dante network ports in each Network Mode. Note: Always connect the Primary port to the network that is used for Shure Control. Dante Port Configuration Port Function...
  • Page 31 Shure Incorporated Star Configuration (Recommended) Daisy-Chain Direct to Computer Warning: Do Not Make a Network Loop Avoid the following setups that will render the network unusable: 31/59...
  • Page 32 Shure Incorporated Do not connect the primary to the secondary port of the same device. Do not connect the two ports to the same switch. Do not connect mixers together in a loop. Redundant and Split Networks The Primary and Secondary ports require dedicated network switches in Redundant Audio and Split modes.
  • Page 33 Shure Incorporated Go to the Device Info tab in Dante Controller. Double-click your SCM820 device. Select the Network Configuration tab. Use the Addresses section to specify static IP. The mixer will reboot once the selection is confirmed. Repeat for each mixer.

  • Page 34: Dante Software By Audinate

    Shure Incorporated Maximum Number of Switches Latency Setting 1 Gbps Network* 100 Mbps Network 2 ms *Strongly Recommended Dante Software by Audinate Audinate software provides additional function and control of the Dante digital audio network. Visit Audinate's website at www.audinate.com for software installation instructions, additional digital audio networking capabilities and troubleshooting help.

  • Page 35: Integrating With Other Systems

    Shure Incorporated • Ensure the switches have at least 300 Mbps of available bandwidth for each device. Devices in a Link Group use more network bandwidth than Stand Alone devices. Automatic Linking The auto link setting enables SCM820s to automatically form a link group when they join the network. No additional setup from the web application is required.

  • Page 36: Advanced Mixer Settings

    To avoid switch clicks, do not connect logic ground to audio, chassis or rack grounds. Applications for Improving Performances This section contains suggestions on the uses of the SCM820's logic capabilities. For additional suggestions and solutions to installation problems, contact Shure's Systems Support. 36/59...

  • Page 37: Web Conferencing

    Shure Incorporated Chairperson-Controlled Muting The chairperson can, by activating a switch, silence all other microphones and be heard without interruption. Set the desired channel to Chairperson Mute to manual in the SCM820 application (IntelliMix Panel > Chairper­ son > Mute). Connect the switch to the Override In logic connection for the chairperson's microphone.

  • Page 38: Digital Feedback Reduction (Dfr)

    Shure Incorporated Digital Feedback Reduction (DFR) DFR uses Shure’s patented Adaptive Notch Filter algorithm to discriminate between feedback and non-feedback sounds. It au- tomatically detects feedback and deploys narrow-band notch filters at the feedback frequencies. DFR filters are narrow enough to prevent any coloration of the audio program. No sound system (the combination of microphones, mixing, signal processing, power amplifiers, loudspeakers and room acoustics) produces an absolutely flat response.

  • Page 39: Filter Width

    • Form large automixes with custom link groups. • Assign the direct outputs in the signal path. • Configure redundant or split networks. • Set up Shure Digital Feedback Reducer (DFR) for up to two channels in each mixer. 39/59...

  • Page 40: Navigation Bar

    • IntelliMix: Select the mix mode and load/save customize IntelliMix settings Tabs • DFR: Set up and monitor Shure Digital Feedback Reducer (DFR) for up to two channels • Output: Assign the direct output and manage Mix A and Mix B outputs • Preferences: Configure network settings, set the device password, assign metering type, and engage hardware lockout.

  • Page 41: Input Tab

    Shure Incorporated Input Tab Channel Name Channel names can be customized with up to 31 any characters in length except '=','.' or '@'. Sets the audio input to one of two sources: • Analog (default): Audio is from a microphone or line-level audio source connected to a Source channel input on the mixer back panel.
  • Page 42 Shure Incorporated For tempering sibilant speech or enhancing the sound of off-axis microphones. Use this to boost or cut the signal by 12 dB at 5 kHz. High-Shelf Filter • Green= enabled • Gray= disabled When selected, the button illuminates green to indicate 48 V phantom power is supplied to the microphone.

  • Page 43: Intellimix Tab

    Shure Incorporated Intellimix Tab Mixer Settings The SCM820 can be set to operate as a single or dual mixer: • Single: 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 record- ing applications. The output gain, parametric equalizer and limiter can be set separately for each mix.
  • Page 44 Shure Incorporated Channel Strip Channel Name Displays the channel name as defined in the Inputs Tab. Routes the channel to the Mix A or Mix B output. The routing options depend on the Mixer Type: Routing • Single Mixer Type: route to both or neither mixe busses.

  • Page 45: Digital Feedback Reduction (Dfr) Tab

    Shure Incorporated Digital Feedback Reduction (DFR) Tab Click this button to enable or disable the DFR notch filtering. It automatically turns on when DFR is assigned to a channel. When disabled, the DFR filters are turned off. Enable/Disable Button •...

  • Page 46: Output Tab

    Shure Incorporated Output Tab Direct Output Channel Name Displays the channel name as defined in the Inputs Tab. The direct output can be routed from one of five stages in the signal path: • Pre-EQ (default): After the Input Gain •...

  • Page 47: Preferences Tab

    Shure Incorporated When DFR is assigned from the DFR tab, an enable/disable button appears in that channel strip. Select to toggle the state: DFR Enable/Disable Button • Green= enabled • Gray= disabled Lim (Limiter) Indicator Illuminates to indicate that the signal has exceed the limiter threshold, engaging the limiter.
  • Page 48 Device names can be customized with up to 31 any characters in length except '=','.' or '@'. Device Serial Number Unique identification of the mixer. Use the number to register the unit at shure.com. Firmware version Displays the firmware version of the device.

  • Page 49: Troubleshooting

    Returns the mixer to default factory settings (clearing the password and device and channel Defaults names). The mixer will reboot in Standalone mode. Network Determines the routing of Shure Control and Dante Audio & Controller data from the two net- work ports. See Port Configuration for details. Follow these steps to change the Configura- tion mode: Disconnect the mixer from the network.
  • Page 50 Solution Ensure the mixer is powered Properly connect the Primary port to the computer's network Device not appearing in Shure Web Turn off other network interfaces not used Device Discovery application to connect to the mixer (including WiFi) Check that DHCP server is functioning (if...
  • Page 51 Power button = On application Preferences tab For additional Troubleshooting assistance or further information on complex installations, contact Shure to speak with a support representative. In the Americas region, call Systems Support group at 847-600-8541. For users in other locations, go to www.shure.com to find support contact for your region.

  • Page 52: Front-Panel Error Messages

    Download the latest firmware from Shure.com and load it to the device. If the error message persists, contact a Shure support representative for your region. Note: To temporarily clear an error message until troubleshooting can be conducted, simultaneously press the Channel 1 knob and Front Panel Mode selector.

  • Page 53: Specifications

    Shure Incorporated Power Cable by Region Part Number China 95B9073 Korea 95B9074 Australia 95A9128 Specifications Audio Frequency Response 20 Hz to 20 kHz (±1 dB) Dynamic Range 20 Hz to 20 kHz, A-weighted, typical Analog-to-Analog 110 dB Analog-to-Dante, Dante-to-Analog 113 dB Output Noise (mix output / direct output)
  • Page 54 Shure Incorporated Housing Steel; Extruded aluminum Power Requirements 100 to 240 V AC, 50-60 Hz, 1 A Operating Temperature Range −18°C (0°F) to 63°C (145°F) Storage Temperature Range −29°C (-20°F) to 74°C (165°F) Analog Connections Channel Input Clipping Level Configuration Impedance Line (+0dB) Mic (+26dB) Mic (+46dB) Active Balanced 5 kΩ +20 dBV −6 dBV −26 dBV Phantom Power 48 V DC, selectable per channel, 14 mA max.
  • Page 55 Shure Incorporated typical Internal Processing 32-bit Latency From channel input to mix output, Estimated Nominal, ±0.1 ms Single Device ( ms) In a Link Group ( ms) Analog to Analog 0.51 0.76 + 4TN Analog to Dante 0.29 0.54 + 4TN Dante to Analog 0.28 + TN...

  • Page 56: Ip Ports And Protocols

    Open 8023 Telnet Debug console interface Password † 8427 Multcast SLP Required for inter-device communication Open 64000 Telnet Required for Shure firmware update Open Dante Audio & Controller Port TCP/UDP Protocol Description SNMP Used by Dante † [319-320]* Dante clocking...

  • Page 57: Connector Diagrams

    Shure Incorporated Port TCP/UDP Protocol Description 8751 Dante Dante Controller 16000-65536 Dante Used by Dante *These ports must be open on the PC or control system to access the device through a firewall. † These protocols require multicast. Ensure multicast has been correctly configured for your network.
  • Page 58 Shure Incorporated IMPORTANT SAFETY INSTRUCTIONS READ these instructions. KEEP these instructions. HEED all warnings. FOLLOW all instructions. DO NOT use this apparatus near water. CLEAN ONLY with dry cloth. DO NOT block any ventilation openings. Allow sufficient distances for adequate ventilation and install in accordance with the manufacturer’s instructions.
  • Page 59 EMC conformance to Environment E2: Commercial and Light Industrial. Testing is based on the use of supplied and recommended cable types. The use of other than shielded (screened) cable types may degrade EMC performance. Changes or modifications not expressly approved by Shure Incorporated could void your authority to operate this equipment. Industry Canada ICES-003 Compliance Label: CAN ICES-3 (B)/NMB-3(B) Authorized under the verification provision of FCC Part 15B.

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