Shure DFR22 Manual
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Shure DFR22 Manual

Shure DFR22 Manual

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DFR22 -- Audio Processor

General Description

The DFR22 Audio Processor with Feedback Reduction is a 2input, 2output
digital audio processor. It is designed to equalize sound system response,
provide dynamics processing and alignment delay, and automatically de­
tect and control acoustic feedback. A built­in 2 X 2 matrix mixer allows ei­
ther or both inputs to be routed to either or both outputs, with additional
controls for levels and polarity.
The DFR22 is ideal for installed sound reinforcement applications, such as
houses of worship, theaters, and meeting facilities. It is also a powerful set­
up tool in live music applications. Using the DFR22s draganddrop graphi­
cal user interface, processors can be placed anywhere in the signal path.
DFR22 Features
• Shure's patented digital feedback reduction algorithm:
◦ Now includes stereo DFR processing capability
◦ New Auto Clear mode clears dynamic filters after a preset change or power cycle. Dynamic filters can be au­
tomatically removed after a specified number of hours.
• Configurable signal path with drag and drop Windows interface. Includes graphic and parametric EQ, up to 10
seconds of delay, compression, limiting, gating, automatic gain control, ducking, and a fully configurable two-
way crossover.
• Phoenix and XLR connectors for each input and output
• Compatible with USB to serial port converters
• Front and back panel RS232 ports:
◦ 3-pin Phoenix connector on back panel
◦ DB9 connector on front panel; requires only TX, RX, and GND to be connected
• Three pre-loaded presets:
◦ Preset 1: Two mono 16 filter DFRs
◦ Preset 2: A stereo 16 filter DFR
◦ Preset 3: A mono 16 filter DFR on each input. Each input is routed to each output.
• Preset selector and indicator for up to 16 presets
• Control input pins for setting up remote preset, volume, and mute controls
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  • Page 1: General Description

    DFR22 -- Audio Processor General Description The DFR22 Audio Processor with Feedback Reduction is a 2input, 2output digital audio processor. It is designed to equalize sound system response, provide dynamics processing and alignment delay, and automatically de­ tect and control acoustic feedback. A built­in 2 X 2 matrix mixer allows ei­...

  • Page 2: Packing List

    Pentium 300 MHz 64 MB 2000 Professional Pentium 300 MHz 96 MB XP Professional, Home Pentium 300 MHz 128 MB *Most USB-to-serial port adapters work well with the DFR22. To see the latest list of fully approved adapters, visit http://shure.custhelp.com/app/answers/detail/a_id/2951 2/16...

  • Page 3: Software Installation

    4. Click OK and follow the on-screen instructions. Using the DFR22 Software Instructions for the DFR22 software are available in PDF format on the CD-ROM included with the system, or on the Shure web site at www.shure.com. Register this product by filling out and mailing the enclosed registration card, or register online at the Shure web site (www.shure.com).

  • Page 4: Back Panel

    Control Pin Connections section. 5. DIP Switches. Use Switches 1-4 to select a Shure Link Device ID. Use Switch 5 to lock or unlock front panel controls. Refer to the Front Panel Lockout section for information on locking front panel controls.

  • Page 5: Front Panel Control Functions

    2. Press the Auto Clear button on the DFR22 front panel. The Auto Clear button will blink. Auto Clear will automat­ ically re-designate any engaged filters as fixed and the rest as dynamic. For example, if you have five filters set, Auto Clear will designate those as fixed and will designate the remaining 11 filters as dynamic.
  • Page 6 You can override this DIP switch using the DFR22 software and individually enable or disable each button on the front panel of the DFR22. Access to the DFR22 via a computer can only be disable by setting the appropriate se­...
  • Page 7 If the feedback does not stop, the filter depth is increased. By default, fil­ ters in the DFR22 are deployed as HIGH Q filters. As a High Q filter gets deeper, its Q increases up to a Q of 101 (1/70th of an octave).

  • Page 8: Audio Connections

    Initialization Once power is applied, the DFR22 Audio Processor takes approximately 5 seconds to initialize. When initialization is complete, the Input/Output LEDs will flash, as shown in Figure 7. The DFR22 is ready to use once the LEDs stop flashing.

  • Page 9: Wiring Connectors

    12 dB and 18 dB Output Pads Each DFR22 output has a 12 dB pad and an 18 dB pad that can be engaged through the software interface. Use these pads when connecting the DFR22 to lower­level inputs. They cannot be used to prevent clipping at the out­...
  • Page 10 Shure Link Network Up to 16 Shure Link devices, including the DFR22, DFR11EQ, DP11EQ, P4800, and UA888, can be linked and controlled from one computer. Using 5-pin DIN cables, connect the Shure Link IN and Shure Link OUT of each device, as shown in Figure 12.
  • Page 11 Figure 12: Shurelink Network Connections DIP Switch Settings for Networked Devices Assign each Shure Link device a unique Device ID Number, using DIP Switches 1-4, as shown in Figure 13. Refer to Table 2 for Device ID settings. Each Shure Link device MUST have a unique Device ID number.
  • Page 12 Control Input pins can be used to change presets, adjust gain, and mute channels. Use the DFR22 software to configure the control pins so that they match the attached control hardware. You can also use the software to assign minimum and maximum gain values for each control, as well as the gain increment for up/down volume control buttons.
  • Page 13 Shure DRS10 are listed in Table 4. The total resistance of the cable run, from the switch to the DFR22, should be less than 100 Ω. Two­conductor, un­ shielded cable, such as a Belden 8442, is recommended.
  • Page 14 For mute control, use either a latching switch or a monetary switch. The total resistance of the cable run from the switch to the DFR22 should be less than 100 Ω. Figure 15 shows an example of how to connect either a latching switch or a monetary switch to the Control Input pins to mute an input or an output.

  • Page 15: Furnished Accessories

    When using momentary switches, the total resistance of the cable run should be less than 100 Ω. As supplied, the DFR22 control pins are configured for use with a 10 kΩ audio taper potentiometer. However, you can use the Potentiometer Calibration Wizard in the DFR22 software to configure the DFR22 for use with any 10 kΩ, 20 kΩ, 50 kΩ, or 100 kΩ...

  • Page 16: Optional Accessories

    Shure Incorporated Line (Power) Cord (SCM810E) 95C8247 5-pin DIN Shure Link Cable 95B8676 Hardware Kit (12 Block Connector Terminals, 3­pin (for audio inputs and out­ 90AY8100 puts) 2 Block Connector Terminals, 10-pin (for control inputs and outputs) 4 Rackmount Screws and Washers)

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