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Coda DNC260 User Manual

Digital loudspeaker processor
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Coda Audio
DNC260 Digital Loudspeaker Processor
User Guide version 0.1

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Summary of Contents for Coda DNC260

  • Page 1 Coda Audio DNC260 Digital Loudspeaker Processor User Guide version 0.1...

  • Page 2: Quick Reference Guide

    Coda Audio DNC260 Quick Reference Guide Display The LCD displays preset and parameter information. The default screen is shown after start up and displays the number and name of the current preset on the lower line of text. When navigating around the adjustable parameters, other information is shown.

  • Page 3: Recall Button

    Coda Audio DNC260 Recall Button To recall a preset, press the recall button and use parameter knob A to select the required preset. Pressing the recall button again will activate the preset. You will then be asked to confirm by pressing recall once more.

  • Page 4: Table Of Contents

    Coda Audio DNC260 Quick Reference Guide ......................... 2 Display ........................2 Channel Select Buttons ..................2 Edit Select Buttons....................2 Parameter Knobs ....................2 Mute Buttons ...................... 2 Store Button ....................... 2 Recall Button ....................... 3 Important Safety Information ..................6 Regulatory Compliance ..................
  • Page 5 Coda Audio DNC260 General ......................30 Processing ......................30 Connectors ....................... 30 User Guide version 0.1 Page 5 of 30...

  • Page 6: Important Safety Information

    Coda Audio DNC260 Important Safety Information Please read carefully and keep the following instructions and safety information. Heed all warnings and follow all instructions. • Do not remove covers. There are no user serviceable parts inside, please refer servicing to qualified service personnel.

  • Page 7: Thanks And Unpacking

    All Coda Audio products are carefully engineered for world-class performance and reliability. If you would like further information about this or any other Coda Audio product, please contact us. We look forward to helping you in the near future.

  • Page 8: Introduction And Key Features

    The Coda Audio DNC260 System Controller is a high performance, easy to use signal processor containing presets for all Coda Audio loudspeaker systems. The DNC260 provides...

  • Page 9: The User Guide

    This user manual gives a progressively more detailed description of the functions of the Coda Audio DNC260 loudspeaker management system. A single page quick reference guide is provided for those users who are experienced with this type of equipment and just need to know how to ‘drive’...

  • Page 10: Front Panel

    Coda Audio DNC260 Front Panel Store and Channel Select 2 x 24 chracter Limiter Recall buttons buttons Indicators Input Signal Parameter Output Mute Edit Parameter buttons Indicators Edit Encoders Select buttons Input Signal Indicators A set of three pairs of LEDs indicate signal present, +4dBu and input clip for each channel.

  • Page 11: Edit Select Buttons

    Coda Audio DNC260 Edit Select Buttons The currently selected edit parameter page is displayed on the bottom left corner of the LCD. Pressing the edit select buttons moves through the available parameters for the current input or output. Text Display Preset, channel, parameter and status information is shown on the 2x 24-character text display.

  • Page 12: Rear Panel

    Serial Comms Port Power Inlet The Coda Audio DNC260 unit should be connected to a suitable mains electricity supply using the cable supplied. The processor has a switch mode power supply that is capable of operating with a nominal mains voltage of 85V to 240V, 50/60Hz without re-configuration.

  • Page 13: Communications Port Connector

    Coda Audio DNC260 Communications Port Connector Coda Audio DNC260 series processor may be controlled entirely from another controller, typically a Personal Computer, running an application that is compliant with the ObCom standard. Connection will normally be made to the controller via this serial port connector.

  • Page 14: Operation

    Selecting a Factory Preset The Coda Audio DNC260 series processors have a library of Factory Presets designed to suit a range of applications. Factory Presets contain some parameters that are fixed and hidden from view; the remainder of the DSP parameters are available for user manipulation.

  • Page 15: Navigation And Viewing Parameters

    Coda Audio DNC260 Navigation and Viewing Parameters Many of the processing elements in each input and output path have features that may be controlled by the user, such as gain, frequency or limiter threshold. We call these adjustable features parameters.

  • Page 16: Presets

    Coda Audio DNC260 CHANNEL Out1 Freq Width Gain 100Hz 1.4Q 0.0dB EDIT Pressing the edit navigation buttons gives access to the various pages of parameters available for each channel. The currently selected page is shown in the bottom left hand corner of the display.

  • Page 17: Preset Store

    Coda Audio DNC260 Preset Name Recall 32 My System SELECT PRESET TO RECALL RECALL RECALL Users can develop their own Preset based on one of the Factory Presets stored within the device. Once a Preset has been recalled, a user has complete freedom to adjust any or all of the parameters.

  • Page 18: Dsp Processing Layout

    Coda Audio DNC260 DSP Processing layout Input DSP block diagram Input Input Order Six Band High Input A Delay LED’s Gain Shelf EQ Shelf EQ Routing - 6dB NB. Channel B processing is identical to Channel A but for Input B...

  • Page 19: Dsp Processing

    Coda Audio DNC260 DSP processing Input Channels Gain In A Gain 0.0dB • Knob A: Gain, adjustable in 0.2dB steps from –80 dB to +20dB Delay In A Delay 1.50ms • Knob A: Delay, adjustable in variable steps from 0 to 400ms The delay parameter is adjustable in fine steps at low values;...
  • Page 20 Coda Audio DNC260 High Pass Filter In A Freq Shape 20.0Hz LR24 • Knob A: Frequency, out (off), 20.0Hz to 25.6kHz in variable steps • Knob B: high pass filter type System high pass filtering is provided for the input signal. This is the preferred location for high pass filtering as it affects all outputs and can therefore improve inter-band phase relationships.
  • Page 21 Coda Audio DNC260 High and Low shelving filters In A Freq Slope Gain 100Hz 12dB 0.0dB • Knob A: Frequency, 10.0Hz to 25.6kHz in variable steps • Knob B: Slope, 6 to 12dB / octave in 1dB steps • Knob C: Gain, +/-15dB in 0.2dB steps The frequency is specified as point where the filter deviates by 3dB from the gain value.

  • Page 22: Output Channels

    Coda Audio DNC260 Output Channels Gain and Polarity Out1 Gain 0.0dB • Knob A: Gain, adjustable in 0.2dB steps from –80 dB to +20dB • Knob B: Polarity, selectable, normal or reversed with reference to other outputs Delay Out1 Delay 1.50ms...
  • Page 23 Coda Audio DNC260 High and Low Pass Filters Out1 Freq Shape 2.50k LR24 • Knob A: Frequency, <<out, 20.0Hz to 25.6kHz, out>> • Knob B: high pass filter type Filter type is selectable from Butterworth, Bessel, Linkwitz-Riley and Hardman. Filter slopes of up to 8th order or 48dB / octave are provided.
  • Page 24 Coda Audio DNC260 Parametric Equalisation Eight sections of equalisation are provided in a similar format to the input channel equalisation; two shelving filters and six parametric. Out1 Freq Slope Gain EQ>- 100Hz 12dB 0.0dB • Knob A: Frequency, 10.0Hz to 25.6kHz in variable steps •...
  • Page 25 Coda Audio DNC260 Limiters Out1 Thresh 4.0dB • Knob A: Threshold, -40dBu to 20dBu in 0.2dB steps A high performance, low distortion limiter is provided on each output. Threshold is user adjustable; all other parameters are carefully calculated dependant on configuration to...

  • Page 26: Utilities

    Coda Audio DNC260 Utilities Utility functions Three utility functions are provided to adjust screen contrast, the display units used for parametric equalisation bandwidth and switch between stereo and mono mode. The device automatically adjusts for the variations in display contrast as the temperature of the LCD changes.

  • Page 27: Eq And Filter Response Graphs

    Coda Audio DNC260 EQ and Filter Response Graphs Butterworth 1 . 10 1 . 10 Frequency, Hz 6dB/Oct 12dB/Oct 18dB/Oct 24dB/Oct 48dB/Oct Linkwitz-Riley 1 . 10 1 . 10 Frequency, Hz 12dB/Oct 24dB/Oct 48dB/Oct User Guide version 0.1 Page 27 of 30...
  • Page 28 Coda Audio DNC260 Bessel 1 . 10 1 . 10 Frequency, Hz 12dB/Oct 24dB/Oct Hardman 1 . 10 1 . 10 Frequency, Hz 4th Order 8th Order User Guide version 0.1 Page 28 of 30...
  • Page 29 Coda Audio DNC260 Shelving EQ 1 . 10 1 . 10 Frequency, Hz Low shelf, varying Gain High shelf, varying Slope Parametric EQ 1 . 10 1 . 10 Frequency, Hz Varying Gain Varying Bandwidth User Guide version 0.1 Page 29 of 30...

  • Page 30: Technical Specification

    Coda Audio DNC260 Technical Specification General Inputs……………………………………………….. Input Impedance………………………………… > 10k Ohm Electronically balanced Maximum Input level…………………….…… +20dBu Outputs…………………………………………….. Output Impedance……………………………… <100 Ohm, ground balanced Maximum Output Level……………………… +20dBu into 600ohm load Sample Rate………………………..…………….. 96kHz Bit Depth…………………………………………… 24 bit Frequency Response………………………………………...

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