Cedar DC-1 De-Clicker Owner'S Manual Download | Manualshive

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Summary of Contents for DC-1 De-Clicker

Page 1: ...CEDAR Professional Hardware Systems DC 1 De Clicker Digital Audio Restoration System 5 11 j C 0 i f 00 g SERIES 2 OWNER S MANUAL 1996 CEDAR Audio Ltd ...

Page 2: ...Sample Installation Ideas 10 A Guide to Restoration Processing 11 Front Panel Indicators and Controls 14 Quick Tour 16 Warmstart and Coldstart 17 Operating the CEDAR DC 1 SERIES 2 18 DEDICATED CONTROLS 18 PAGES 19 CONTROL PAGE 20 INPUT OUTPUT CONTROL 22 REMOTE CONTROL 26 STATUS PAGE 27 STATUS INDICATORS 27 STATUS PAGE DEFINITIONS 28 Notes and Hints to Users 29 Remote Control Protocols 30 RS232 30 ...

Page 3: ...t resolution when using AES EBU interfaces Three sample rates supported on digital inputs 32kHz 44 1 kHz and 48kHz Two sample rates supported on analogue inputs 44 1 kHz and 48kHz Balanced analogue inputs and outputs for connection to professional analogue equipment ADC and DAC converters using the latest 64x over sampling Delta Sigma technology 103dB dynamic range AID and 93dB dynamic range D A M...

Page 4: ...ee categories thumps which includes loud pops scratches including ticks and clicks and crackle The DC 1 SERIES 2 has been designed to perform real time scratch removal The operation of the DC 1 is totally digital and any signal presented to the analogue inputs is internally converted to a suitable digital format by the integrated high quality analogue to digital converter ADC Following click remov...

Page 5: ... stand care should be taken when moved uneven surfaces or excessive force may cause cart and DC 1 to overturn Do not position the DC 1 in a place subject to strong sunlight excessive dust mechanical vibration or periodic shocks 6 Wall or Ceiling Mounting The DC 1 SERIES 2 has not been designed for mounting directly to walls or ceilings 7 Ventilation Good air circulation is essential to prevent int...

Page 6: ... Therefore if the DC 1 is not to be used for an extended period of time unplug the unit from the wall Pull the connector out by the plug never by the cord itself 13 Cleaning Clean only with a dry cloth NEVER use liquid cleaners such as alcohol or benzene on the DC 1 SERIES 2 NEVER use abrasive pads on the DC 1 14 Damage Requiring Service The DC 1 SERIES 2 should be returned to qualified seNice per...

Page 7: ...s Nominal temperature should be maintained between 5 and 35 Centigrade 41 and 95 Fahrenheit Relative humidity should be in the range 30 to 60 non condensing Strong magnetic fields should not exist nearby 3 Rack Mounting The DC 1 SERIES 2 can be mounted in a standard 19 EIA rack 4 Free Standing use The DC 1 SERIES 2 can be used as a free standing unit The rack mount ears may then be replaced by the...

Page 8: ...N L R OUT L IN LTC OUT IN VITC OUT 0 0 0 6 re 0 0 I g 0 0 0 0 00 000 0 I AES IN SPDIF SPDIF o AES IN OUT THRU g RS 232 INTERFACE 0 0 0 000 1 1 0 t t t l Digital VO SP DIF f MIDI RS232 I InJOuUThru Interface Digital 1 0 AES EBU CAUTION POWER DO NOT OPEN RISK OF ELECTRIC SHOCK Lt a Serial No DC 1 SERIES 2 Rev 02 Ver 3 06 December 4 th 1996 6 ...

Page 9: ...d do so by grasping the plug not the lead 2 Power Connections Ensure that the DC 1 SERIES 2 is switched OFF before inserting the mains lead For further information on grounding and polarity consult a person familiar with studio grounding techniques 3 Signal Lead Connections Refer to the Rear Panel diagram The DC 1 SERIES 2 offers three audio connection standards one analogue and two digital These ...

Page 10: ...rofessional digital audio devices including mastering systems DASH recorders and high quality ADCs DACs Both channels of audio are carried along a single cable so you may connect the AES EBU output from your source to the AES EBU input of the DC 1 SERIES 2 using a single cable terminated with XLR plugs The AES EBU output of the DC 1 SERIES 2 may be connected to the AES EBU input of your digital mi...

Page 11: ...present ii MIDllN OUTrrHRU The operation of the DC 1 SERIES 2 may be controlled using the Musical Instrument Digital Interface MIDI Refer to the chapter on Remote Control Protocols for further instructions iii RS232 The DC 1 SERIES 2 may be controlled using the standard RS232 serial interface Refer to the chapter on Remote Control Protocols for further instructions DC 1 SERIES 2 Rev 02 Ver 3 06 De...

Page 12: ...al in digital out digital in SOURCE MIXER elfects retum RECORDER line out line in DC 1 AMP 2 DC 1 SERIES 2 used on the effects loop within a studio environment line out analogue or di itaIin analogue or di italout analogue or di ifal in analogue or di italout analogue or di itaI in SOURCE DC 1 CEDAR RECORDER or other workstation editor line in AMP 3 DC 1 SERIES 2 used in line prior to an editor or...

Page 13: ...R De Hiss products HISS 1 HISS 2 DH 2 De Hisser they confuse the processes and create unmusical side effects In addition De Hissing at this stage will make it almost impossible to identify and remove clicks and scratches at a later time De Crackling should be the next process because even small crackles can cause the same problems as in ii above Azimuth Correction can be carried out either before ...

Page 14: ...erial Next remove crackle and buzz and reduce distortion if appropriate Then apply Azimuth Correction to material with phase and balance problems Finally apply noise reduction DC 1 SERIES 2 Rev 02 Ver 3 06 December 4 th 1996 12 ...

Page 15: ...Hz B_ OdS Dde Powo e e Bypau _ 2 2 2 2_ l I o Pt D o S Pool PrelPOO1 EnI_ Lov 1 CEDAR De Clicker DC 1 0 o o DO 0 0 0 Con11ost SERIES 2 0 Phon Input Lave O oIpul Attenuation I o t Fl t F2 t F3 t F4 r F5 Headphone Level Headphones Socket Input Level Output Attenuation I Function Keys Contrast Control Control Control Control 0 CD DC 1 SERIES 2 Rev 02 Ver 3 06 13 December 4th 1996 ...

Page 16: ...lbto all d stlnal ons DO this pm 1lI com ndlinjj rous goodS Oljckheretl goods re not in Iree circulatIOn n b dodl l od C I IfooBl rl a 40 V s o III CA 0 CargoAircra Only 29 0 80Ves I 6 D r0 41 1845 _______ _______ g D Payment TRANSPORTATION CHARGES PAID BY 0 Obi n R r lIu l1 d Cfrml dEx COIU U no orCredit Card o Del w lt Pa dF t A Ol lf t lt I 0 Sender 2 clpient 3DThird Party 40 Credit Card 5 U Ca...

Page 17: ...Envelope III Special Handling IIIIl 11 opu evoilebl o oil de rtn n Do thissfti contain dIInge 1JS goods OTlckhantltuoodsa not in lIelf r c 8 tOn and lMd C I I ru nebo mUS1b bC edJ U No DYes o I II CA 0 CargoAircraft Only 29 0 D Ory Ice D Yes IkyIC t UN 114 _ __ _ _ _ __ 1 mPayment TRANSPORTAnON CHARGES PAlO BV l fn dEI etCau11 no or erldJt CI d no baklwl o Sender D Rec pienl 0 Third Party 0 Credrt...

Page 18: ...f information and messages keeping you aware of what is currently happening in the DC 1 SERIES 2 All the control screens of the DC 1 SERIES 2 are displayed on the LCD screen Please refer to the following chapters for full instructions 5 Status Indicators Indicate the status of the analogue and digital inputs and whether the DC 1 SERIES 2 is in idle or processing modes Also indicate the possible ca...

Page 19: ...on the Input Signal Meters will offer best results The Input Level Control may be physically bypassed internally to obtain the best possible signal to noise ratio SIN from the ADCs This work must be carried out by qualified service personnel so please refer to your authorised dealer or directly to CEDAR Audio to have this modification performed 11 Output Attenuation Control A digital gain control ...

Page 20: ...ogue ii If you are using digital inputs from a consumer format machine such as a domestic DAT recorder press B twice to select SP DIF If you are outputting to a consumer format machine such as a low cost DAT recorder press A to select SP DIF format iii If you are using professional digital inputs then verify that the input is set to AES EBU 6 Press PAGE twice to return to the Control Page 7 Play y...

Page 21: ...are Threshold 10 Mode Medium Other default values are Digital Output AES EBU Input Source AES EBU Receiver Error Level 1 Lock MIDI Channel 1 Bypass OFF A to D frequency 44 1 kHz Pre Post Post Warmstart The DC 1 SERIES 2 remembers the latest parameters used and the page that was active at the time that the system was last switched off On start up the DC 1 SERIES 2 will display the message Warmstart...

Page 22: ...ill pass through the AtoD and DtoA stages with the following effects There is a delay of approximately 1 3mS in any analogue to analogue signal passed through the DC 1 SERIES 2 in Bypass mode There is a delay of approximately O 1mS in any digital to digital signal passed through the DC 1 SERIES 2 in Bypass mode All delays are group delays i e are constant at all frequencies and are measured at a s...

Page 23: ...clipping using the Output Attenuation Control This is not a compressor or limiter and acts purely as a digital gain control with variable gain from OdB to 10dB in 1dB steps 2 PAGES The DC 1 SERIES 2 has three pages which control all aspects of its operation Each page is displayed on the LCD screen and may be controlled using the Function Keys and the spinwheel The pages are cycled by pressing the ...

Page 24: ...ll tick removal 5 Increase or decrease the threshold by turning the spinwheel clockwise or anticlockwise respectively To adjust the Channels individually At the bottom of the screen you will find three items of information These are the Left Threshold numeric value the Mode the Right Threshold numeric value You will note that both thresholds are surrounded by boxes This shows that they are SELECTE...

Page 25: ...storation Small Use this setting when the damage is predominantly small clicks and ticks Medium This is a compromise setting lying between the small and large settings Large Use this setting when the material suffers from larger thump like scratches Press function key under the word MODE to toggle between the Scratch Mode settings WARNING Signal degradation may occur if an inappropriate Scratch Mo...

Page 26: ...e three options in the 1 0 Control Page A DIGITAL OUTPUT This option defaults to AES EBU To toggle between the two output modes AES EBU and SP DIF press function key marked A on the LCD screen AES EBU FORMAT When AES EBU is selected both the phono and XLR connectors will carry AES EBU specification audio data You should patch the output from the XLR connectors to your recording device The DC 1 SER...

Page 27: ...al presented to inputs 44 1 kHz LED lit 44 1 kHz signal presented to inputs 48 kHz LED lit 48kHz signal presented to inputs CLOCK DETECTION If the DC 1 SERIES 2 fails to detect a digital signal within the following limits the 44 1 kHz and 48kHz LEOs will flash continually This will be irrespective of any other system settings Acceptable ranges 44 1kHz 48kHz 32kHz 4 4 4 SAMPLE RATE OF A TO 0 CONVER...

Page 28: ... either of these and selecting AES Sync or SP OIF Sync as appropriate will lock the OC 1 SERIES 2 to the external clock If the external clock falls within the acceptable ranges of each of the standard sample rates 44 1 kHz 48kHz and 32kHz the clock frequency will be shown on the LEOs If the external clock lies outside these ranges the OC 1 SERIES 2 will still function and good audio will be produc...

Page 29: ...S This indicates that the incoming digital audio data is of poor quality i e very noisy or jittery and that undetectable data errors are likely These errors will not be corrected by any standard AES EBU or SP DIF device and may lead to audio degradations 4 VALID This is the most stringent test of the incoming data and will cause the LED to flash if the DC 1 SERIES 2 determines that any of the data...

Page 30: ...mote devices to control the DC 1 SERIES 2 over MIDI MIDI CHANNEL Ensure that button A is highlighted by a box It is then possible to change the MIDI Channel turn the spinwheel clockwise to increase or anti clockwise to decrease the MIDI Channel To toggle this function on off press the function key marked A on the LCD screen On Coldstart the MIDI Channel defaults to 1 RS232 CEDAR Audio Ltd does not...

Page 31: ...any errors which have occurred since the unit was switched on Three items of information will always be reported by the DC 1 SERIES 2 These are DSP1 Status Crashed Timed Out Running DSP2 Status Crashed Timed Out Running I O Condition Error Emphasis Sample Rate If a remote control error is detected a fourth field will appear Comms Error Illegal Checkbyte Illegal Command Size STATUS INDICATORS The f...

Page 32: ...nce the unit was switched on If the DIGITAL LED is flashing the most serious error will be detailed at this point Errors are fully detailed in the DC 1 SERIES 2 Service Manual If no error is detected the I O status will display the Emphasis condition OFF The Emphasis bit is not set The DAC de emphasis will not be engaged 50 15 The Emphasis bit is set to 50 15 IlS The DAC de emphasis will be engage...

Page 33: ... no distortion will be introduced with a threshold of 8 or above When the Large Mode is selected it will be necessary to use higher thresholds than typical for Small and Medium modes This is a consequence of the differences between the algorithms used in the modes In special cases noticeably high pitched high amplitude big band brass the de scratch process will not totally de click without distort...

Page 34: ...s together form a signed integer Command Numbers Command Values OxF7 Clear Errors command Any value Clear all error messages OxF8 Select Page command 1 Control Page 6 I O Control Page 7 Status Page 15 Remote Control Page 1 Toggle between Pages Any other value Refresh OxF9 Pre Post command 0 Pre 1 Post 1 Toggle Any other value Refresh OxFA Bypass command 0 Bypass OFF 1 Bypass ON 2 RESERVED VALUE 3 ...

Page 35: ...cratch Mode 0 1 2 1 Any other value Ox24 Set Right Threshold Any value The minimum threshold is O The maximum threshold is 40 Ox34 Alter Right Threshold Any value DC 1 SERIES 2 Rev 02 Ver 3 06 December 4 th 1996 Analogue SP DIF AES EBU Toggle Refresh 44 1kHz 48kHz SP DIF Sync AES Sync Toggle Refresh 1 Lock 2 Code 3 Trans 4 Valid Toggle Refresh Left Threshold x 100 II Left Threshold x 100 Small Med...

Page 36: ...as the basis for an automation system Note The absolute parameter values are not transmitted or received so the user must ensure that any changes are relative to a desired starting value which can be set using MIDI DUMP If a MIDI DUMP of all Control Page parameters and the Pre Post state is required pressing ENTER at any time will initiate the DUMP Additional MIDI Command The DC 1 can receive LOCA...

Page 37: ...fied that all the keys are operating correctly press ENTER to proceed to the next test page ROUTINE 2 ATTENUATION KNOB TEST Check that the Attenuation knob position matches the value displayed on the screen for all possible knob positions Press ENTER to proceed to the next test page ROUTINE 3 SPINWHEEL TEST Rotate the spinwheel and check that values displayed change smoothly in both positive clock...

Page 38: ...the self test If the message recurs please contact your dealer for assistance Press ENTER to proceed to the next test page WARNING The DC 1 SERIES 2 contains no user serviceable parts DO NOT UNDER ANY CIRCUMSTANCES attempt to service your unit ROUTINE 7 DSP2 TEST As above TEST COMPLETED Press ENTER one more time to return you to normal operating mode whether all tests have been passed or not Some ...

Page 39: ...hones 15 Level 15 Heat 3 HISS 1 11 HISS 2 11 humidity 5 I O Control Page 19 22 30 L LCD screen 14 15 LED 18 23 24 27 44 1 kHz 23 27 48kHz 23 27 Bypass 27 Digital 23 24 25 27 28 Pre Post 27 Self test 33 M magnetic fields 5 Memory 34 Meters 1 14 33 input signal 14 15 19 output signal 14 Over 14 peak 14 19 Self test 33 MIDI 1 9 17 26 28 32 Channel 17 26 DUMP 19 32 33 LOCAL OFF 32 LOCAL ON 32 Mode 20 ...

Page 40: ...VITC 9 Transients 29 T w Threshold 17 20 29 31 Warmstart 17 32 v Thumps 2 21 Ticks 2 20 21 29 Ventilation 3 x Timecode 9 LTC 9 XLR shell 8 SMPTElEBU 9 DC 1 SERIES 2 Rev 02 Ver 3 06 December 4 th 1996 36 ...

Page 41: ...CEDAR DC 1 Designed and Manufactured by CEDAR Audio Ltd 9 Clifton Court Cambridge CB14BN Tel 44 0 1223 414117 Fax 44 0 1223414118 DC 1 SERIES 2 Rev 02 Ver 3 06 December 4 th 1996 37 ...

Page 42: ...NT FULLY CONFORMS TO THE PROTECTION REQUIRElYffiNTS OF THE FOLLOWING EC COUNCIL DIRECTIVES ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES RELATING TO 89 336 EEC ELECTROMAGNETIC COMPATIBILITY APPLICABLE STANDARDS EN 50081 1 92 EN 50082 1 92 73 23 EEC LOW VOLTAGE EQUIPMENT APPLICABLE STANDARD BSEN 60 065 1994 SIGNED GORDON REID POSITION MANAGING DIRECTOR DATE 19 DECEMBER 1995 DC 1 SERIES 2 Re...

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