Coda Audio DNC260 Digital Loudspeaker Processor User Guide version 0.
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. Channel Select Buttons The currently selected input or output channel is shown in the top left corner of the display. Pressing the channel select buttons scrolls through the available inputs and outputs.
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. As with the store function, pressing any button other will cancel the process. User Guide version 0.
Coda Audio DNC260 Quick Reference Guide ................................................................................................................. 2 Display .....................................................................................................................2 Channel Select Buttons.........................................................................................2 Edit Select Buttons...............................................................................................
Coda Audio DNC260 General ............................................................................................................ 30 Processing ........................................................................................................ 30 Connectors ....................................................................................................... 30 User Guide version 0.
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. • This equipment must be earthed. • Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
Coda Audio DNC260 Thanks and Unpacking Thank you for choosing a Coda Audio DNC260 loudspeaker management system for your application. Please spare a little time to study the contents of this manual, so that you obtain the best possible performance from this unit. 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.
Coda Audio DNC260 Introduction and Key Features Introduction The Coda Audio DNC260 loudspeaker management system represents the current state-ofthe-art. Taking advantages of the latest advances in analogue to digital conversion and digital signal processing technologies the units achieve performance levels that have only recently been made possible. The Coda Audio DNC260 System Controller is a high performance, easy to use signal processor containing presets for all Coda Audio loudspeaker systems.
Coda Audio DNC260 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’ the front panel. A detailed explanation of the front and rear panel controls and indicators is contained in the next section.
Coda Audio DNC260 Front Panel Store and Recall buttons Input Signal Indicators Channel Select buttons 2 x 24 chracter LCD Edit Parameter Select buttons Parameter Edit Encoders Limiter Indicators Output Mute buttons Input Signal Indicators A set of three pairs of LEDs indicate signal present, +4dBu and input clip for each channel. The signal present LEDs operate at approximately –40 dBu, giving a useful indication of even relatively low input signal levels.
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. In most screens the currently selected channel is displayed on the upper line and the edit parameter on the lower line.
Coda Audio DNC260 Rear Panel Rear Panel of standard DNC260 Power Inlet Expansion Port Serial Comms Port Secure Mode Switch Audio Input Connectors Audio Output Conectors 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.
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. This port is also used for updating the firmware in the unit. Note that the communications port is NOT disabled when the front panel is made secure using the secure button.
Coda Audio DNC260 Operation Starting up The unit will energise as soon as power is applied to the IEC inlet; there is no power switch. During the start up process the firmware application model number and version numbers are displayed and the outputs are muted until the unit has completed its internal checks. Once the start-up routines are complete, the unit is ready to pass audio. The DSP signal path will be restored to the same settings as when it was last powered down.
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. In A Freq EQ1 100Hz Width 1.4Q b a a b Gain 0.0dB c c A parameter may be adjusted when it is displayed by turning one of the three-parameter knobs. Each of the three-parameter knobs is associated with a zone on the display.
Coda Audio DNC260 CHANNEL EDIT Out1 Freq EQ1 100Hz a Width 1.4Q b Gain 0.0dB c 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. This is omitted on some pages where the function is obvious. The screen shows up to three (normally related) parameters for a given part of the processing functions on a given channel.
Coda Audio DNC260 Preset Name Recall 32 My System a SELECT PRESET TO RECALL RECALL c b RECALL a 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. Preset Store To store the current Preset in a user location, press the Preset Store Button so the indicator above it illuminates.
Coda Audio DNC260 DSP Processing layout Input DSP block diagram Input LED’s Input A Input Gain Delay 4th Order HPF Low Shelf EQ Six Band PEQ High Shelf EQ Routing SUM - 6dB NB.
Coda Audio DNC260 DSP processing Input Channels Gain In A Gain 0.0dB a b c a • Knob A: Gain, adjustable in 0.2dB steps from –80 dB to +20dB Delay In A Delay 1.50ms a b c a • Knob A: Delay, adjustable in variable steps from 0 to 400ms The delay parameter is adjustable in fine steps at low values; the adjustment becomes progressively coarser as the value increases.
Coda Audio DNC260 High Pass Filter In A Freq Shape HPF 20.0Hz LR24 a a b c b • 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. Filter type is selectable from Butterworth, Bessel, Linkwitz-Riley and Hardman.
Coda Audio DNC260 High and Low shelving filters In A Freq EQ1 100Hz Slope 12dB b a a Gain 0.0dB c b c • 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. Parametric filters In A Freq EQ1 100Hz Width 1.4Q b a a Gain 0.0dB c b c • Knob A, Centre Frequency, 10.0Hz to 25.
Coda Audio DNC260 Output Channels Gain and Polarity Out1 Gain 0.0dB Pol Rev a a b c b • 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 a b c a • Knob A: Adjustable in variable steps from 0 to 80ms As for input delay, velocity sensitive Parameter Knobs provide finer adjustment at low levels and rapid selection of higher values. User Guide version 0.
Coda Audio DNC260 High and Low Pass Filters Out1 Freq LPF 2.50k Shape LR24 a a b c b • Knob A: Frequency, <> • 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. Not all filter types are available in all slopes. For example 18dB / octave Linkwitz-Riley filters do not exist.
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 EQ>- 100Hz Slope 12dB a a b Gain 0.0dB c b c • 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.
Coda Audio DNC260 Limiters Out1 Thresh LIM 4.0dB a b c a • 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 provide clean and effective control of signal dynamics. Routing Out1 Source Inp A a b c a • Knob A: Output source, selectable; Input A, Input B or Sum A+B configures the routing from input to output.
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. The screen contrast utility control sets the base contrast of the screen and also allows optimization for a given viewing angle.
Coda Audio DNC260 EQ and Filter Response Graphs Butterworth 6 Magnitude, dB 0 6 12 18 24 30 36 100 3 1 .10 Frequency, Hz 1 .10 4 6dB/Oct 12dB/Oct 18dB/Oct 24dB/Oct 48dB/Oct Linkwitz-Riley 6 Magnitude, dB 0 6 12 18 24 30 36 100 1 .10 Frequency, Hz 3 1 .10 4 12dB/Oct 24dB/Oct 48dB/Oct User Guide version 0.
Coda Audio DNC260 Bessel 6 Magnitude, dB 0 6 12 18 24 30 36 100 1 .10 Frequency, Hz 3 1 .10 4 12dB/Oct 24dB/Oct Hardman 6 Magnitude, dB 0 6 12 18 24 30 36 100 1 .10 Frequency, Hz 3 1 .10 4 4th Order 8th Order User Guide version 0.
Coda Audio DNC260 Shelving EQ 15 Magnitude, dB 10 5 0 5 10 15 100 1 .10 Frequency, Hz 3 1 .10 4 Low shelf, varying Gain High shelf, varying Slope Parametric EQ 15 Magnitude, dB 10 5 0 5 10 15 100 1 .10 Frequency, Hz 3 1 .10 4 Varying Gain Varying Bandwidth User Guide version 0.
Coda Audio DNC260 Technical Specification General Inputs……………………………………………….. 2 Input Impedance………………………………… > 10k Ohm Electronically balanced Maximum Input level…………………….…… +20dBu Outputs…………………………………………….. 6 Output Impedance……………………………… <100 Ohm, ground balanced Maximum Output Level……………………… +20dBu into 600ohm load Sample Rate………………………..…………….. 96kHz Bit Depth…………………………………………… 24 bit Frequency Response………………………………………... 10Hz to 40kHz, +/- 3dB (filters disabled) 20Hz to 20kHz, +/- 0.
