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CEDAR DNS 4 dialogue noise suppressor

Page 19

Using the DNS 4

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Summary of Contents for DNS 4

Page 1: ...DNS 4 dialogue noise suppressor OWNER S MANUAL 2022 CEDAR Audio Ltd Manual version 1 00 September 2022 ...

Page 2: ...CEDAR DNS 4 dialogue noise suppressor Page 2 Intentionally left blank ...

Page 3: ...tting up the DNS 4 7 The front panel 12 The process page 14 The channel setup page 16 The global setup page 17 Using the DNS 4 19 Processing 20 Summary of operation 22 Additional information 23 Declaration of conformity 25 3rd party Licence 26 Contact information 27 Specifications 28 Licence and limited warranty 30 ...

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Page 5: ...situations not just on location and for live to air broadcasting but also for live sound in venues such as theatres concert halls conferences venues and places of worship Quality speed and simplicity were paramount considerations when designing the DNS 4 which offers the following Near zero latency Its low latency ensures that there is no loss of lip sync Flexibility It s able to handle a wide ran...

Page 6: ...large amounts of heat Power sources The DNS 4 operates on nominally 12VDC power although it will operate on voltages in the range from 8V 17 5V You should route power cables so that they will not be walked on or pinched Unplug the supply cord to isolate the external PSU from the mains supply if it is not to be used for some time Grasp the supply cord by the plug never by the cord itself Connection...

Page 7: ...CEDAR DNS 4 dialogue noise suppressor Page 7 Setting up the DNS 4 ...

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Page 9: ...sheet a warranty registration card To maintain reliability and prolong operating life observe the following environmental considerations the temperature should be maintained between 5 and 30 Celsius relative humidity should be in the range 30 to 80 non condensing strong magnetic fields should not exist nearby Power source A 12V PSU is included with the DNS 4 and this will work on any mains supply ...

Page 10: ...Connections of a similar function are grouped together with the low channel numbers within each group towards the rear of the unit Inputs There is a single global user control to switch between analogue or digital inputs See Global setup When analogue inputs 1 2 are in use a pair of three position switches select between line microphone and microphone with 48V phantom powering for each of these ch...

Page 11: ...eration is selected for both the inputs and the outputs the analogue circuitry is turned off to save power and the Line 1 and Line 2 outputs are not operational Audio clock A single audio clock is used for the DSP ADC DAC and AES3 transmitter When analogue I O is used the internal 48kHz clock is used When AES3 input 1 2 is connected the clock is derived from that source Operation at 44 1kHz 48kHz ...

Page 12: ...ee control pages and the functions of the context sensitive controls depend on which is active Process The main page displays control and status information about the processing Channel setup Allows access to options that are specific to a given channel Global setup Allows access to unit wide options and also displays static information about the unit Fixed function buttons Power lock The DNS 4 sw...

Page 13: ... are also stored a few seconds after you stop adjusting the controls Should something cause the unit to freeze you can switch it off by a holding the Power lock button for approximately six seconds Setup The Setup button cycles through additional pages to access the setup parameters It s illuminated when the unit is displaying pages other than the Process page Bypass The Bypass button acts as a gl...

Page 14: ...each of the four channels The information shown for each channel is the noise Attenuation the Bias the linking status Channel linking You can link certain combinations of channels into groups Grouping channels makes them adopt identical settings and allows you to adjust them together The channels in a group share the same values of the following parameters input gain high pass filter on off proces...

Page 15: ...ded in it Pressing the same pair of buttons again destroys the group and the channels return to being independent When a group is created the process parameters from the lowest numbered channel in the new group are copied to the other channel s in the group No process parameters are changed when a group is destroyed Groups can be created and destroyed on both the Process page or the Channel setup ...

Page 16: ...puts are used a second vertical display is shown for each channel This is the input gain and you adjust this by selecting the appropriate channel and turning the encoder Note that if channel 1 is set to MIC or 48V and channel 2 is set to LINE or vice versa their gain and high pass filter settings remain independent even if channels 1 and 2 are linked High pass filter An 80Hz 18dB oct high pass fil...

Page 17: ...plit mode operation In split mode the signals presented to inputs 1 2 are duplicated and sent to channels 3 4 This allows inputs 1 2 to be processed and output in two different ways including outputting the duplicate pair without processing to create iso tracks Outputs 3 4 analogue line or AES3 digital Select whether outputs 3 4 carry line level analogue or digital signals The input output selecti...

Page 18: ...llows the DNS 4 to be used as a mic pre as well as a processor within an otherwise digital system 3 allows you to output analogue signals from a digital system 4 is digital to digital and all the analogue I O is switched off to save power Press setup again or wait for the timeout to return to the Process screen ...

Page 19: ...CEDAR DNS 4 dialogue noise suppressor Page 19 Using the DNS 4 ...

Page 20: ...in the noise content within the audio signal When it s On the DNS 4 continually identifies the power and spectral distribution of the noise When it s Off the noise estimate is frozen at the last determined values and remains so until it s switched on again Note Learn is not a method for taking a noise fingerprint and for most jobs by far the best results are obtained by leaving it switched on perm...

Page 21: ...e process to remove more noise but may lead to compression of the wanted audio and make the signal sound dry Lower the Bias to bias the algorithm toward detecting less noise This will allow the process to retain more atmos but may allow noise to leak back into the wanted signal In most cases the optimum value for the Bias is the central zero point The right hand bargraph shows the detected signal ...

Page 22: ...earn You can bias the detection upward more noise detected or downward less noise detected Attenuation This determines how much noise will be removed from the signal In short Learn and Bias determine what is detected as noise Attenuation determines how much of the detected noise is suppressed The display The average attenuation being applied across all frequencies The maximum attenuation being app...

Page 23: ...CEDAR DNS 4 dialogue noise suppressor Page 23 Additional information ...

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Page 25: ...dio Ltd are designed to be compliant with Directive 2015 863 EU Restriction of Hazardous Substances The manufacturing processes include the assembly of purchased components and or sub assemblies from various sources Any statement of RoHS compliance made by CEDAR Audio Ltd may be based in part or in full on statements provided by suppliers Thus whilst every effort is made to ensure compliance CEDAR...

Page 26: ... permit persons to whom the Software is furnished to do so subject to the following conditions The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software If you wish to use our Amazon FreeRTOS name please do so in a fair use way that does not cause confusion THE SOFTWARE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EXPRESS OR IMP...

Page 27: ...Kingdom t 44 1223 881771 e support cedaraudio com USA Office CEDAR Audio USA 82 Gilman Street Portland ME 04102 USA t 1 207 828 0024 e cedarusa cedaraudio com German Office CEDAR Deutschland Görlitzer Str 3 D 49525 Lengerich Deutschland t 49 5481 945087 e info cedaraudio de Web www cedaraudio com Worldwide Dealer List Visit www cedaraudio com ...

Page 28: ...ophone inputs Connector Balanced XLR3F Impedance 2kΩ Gain range 18dB to 78dB ADC line up 36dB gain 32dBu 20dBFS Dynamic range 36dB gain 102dB AES17 unweighted Phantom Power Type P48 IEC61958 Unloaded voltage 48V 4V Current available 10mA per microphone Short circuit protection Indefinite AD DA conversion Resolution 24 bit linear PCM Sample rate internal sync 48kHz Sample rate external sync 40kHz 1...

Page 29: ...mple rate external sync locked to digital input DSP Type Floating point Resolution 40 bit Sample rates 44 1kHz 48kHz 96kHz Latency 4ms in all modes Power input Voltage 8V to 17 5V nominal 12V Connector Hirose 4 pin HR10 pin1 pin4 Reverse polarity protection Indefinite Over voltage protection Indefinite up to 50V Max power consumption 12V 10W Power adapter Input voltage 85VAC 260VAC 50 60Hz Input p...

Page 30: ...nformation and intellectual property rights of the Company and other owners of intellectual property in the System 4 LIMITED WARRANTY AND POST WARRANTY OBLIGATIONS 4 1 The Company warrants that a System will perform substantially in accordance with the appropriate section of its accompanying product manual for a period of one year from the date of supply to the Company s immediate customer 4 2 The...

Page 31: ...or the System by the Company from its immediate customer depreciated on a straight line basis over a one year write off period or repair or replacement of those components of the System that do not meet the warranties contained within this Document The foregoing states the entire liability of the Company to the Licensee 10 CONSEQUENTIAL LOSS Even if the Company has been advised of the possibility ...

Page 32: ...om www cedaraudio com info cedaraudio com t 44 1223 881771 Copyright CEDAR Audio Ltd 2022 CEDAR is a registered trademark of CEDAR Audio Ltd DNS DNS One DNS 8D DNS 8 Live DNS 8 CS DNS One DNS Two DNS 2 DNS 4 DNS1000 DNS1500 DNS2000 and DNS3000 are trademarks of CEDAR Audio Ltd E OE Subject to revision at the Company s sole discretion ...

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