Centro User Manual 1.2
Contents
1. g L and L NYHL 9 4 23H d O Z 5 LIV d O L H3DIV3dS LIV d O H3 IV3dS NIVIA SLLVM zH09 0s V5v 0091 ASLL 1 H 1 di H 1 H 1 L gt P IL pP gt IL pl p IL pP ll p llc gt pP ISNA SAVAYIV MS 1 ANI 31034 1 NI v ER EN Bi 0921 AOEZ LU NOILN3 LIV NOI Ln VO SHNLSIOW HO NIVH OL Ed 15 Zd 15 15 8 4 TWLIDIC 199195 MVC 4 5 1 Making A B comparisons between sources is a lot easier when the levels are matched To adjust for the playback level of different devices each analogue source has its own trim control on the front panel of the Centro rack unit UNCAL B 42 00 a22 a2 B 42 7B 442 a2 7B 443 42 aao 2172 CIOD Gur 22 49 1 2 LEFT Normally the trim control is out of circuit so press UNCAL to activate it Set your trim level as required 12dB The varying sensitivity of amplifiers can require level adjustments to be made so that the monitor volume control can operate at its optimum position Centro provide2. WARNING THIS EQUIPMENT MUST BE EARTHED DO NOT EXPOSE RAIN MOISTURE This unit is connected via its power cord to the mains safety earth NEVER OPERATE THE UNIT WITH THIS EARTH CONNECTION REMOVED DO NOT remove the covers Refer servicing to qualified personnel only Your Centro is set to operate at either 115 or 230 Volts as indicated on the rear panel Ensure that your Centro is correctly rated for the country of operation CHECK that the fuse fitted is of the correct type for the local mains voltage ALWAYS replace fuse with the correct type For 230 Volts use T250mA slowblow type For 115 Volts use T500mA slow blow type DO NOT expose the unit to rain or moisture If your Centro should become so exposed REMOVE the mains power immediately ALWAYS site your Centro away from sources of heat including direct sunlight and ensure adequate ventilation around the unit This product complies with both the EMC Directive 89 33 6 EEC and the Low Voltage Directive 73 23 EEC as issued by the Commission of the European Community Compliance with these directives imply conformity with the following European standards EN60065 Product safety e 55103 1 Electromagnetic Interference Emission EN55103 2 Electromagnetic Susceptibility Immunity Thank you for buying this Audient product We hope your Centro will bring you years of fruitful source selection cue mixing monitor contr
3. SLAW SLAW ino 9 91a 1 1 1 MOVSDIIV L ee m en Tee er Ow o 9 1 z ano d O L ano NYHL 8 4 334 NIYIN zeari L Liv 4 ONOW 15 N3 LSI1 M23H2 o o ans 3 5vga 4i 15 Did H 1 di 14 H 1 s 1 ONOIN NO ONOIN 3SVHd ous zano 985 1 1 LS 9 pP IL gt _ pL p O E res 1431 Ara 15 15 L 15 XIN XIN 8 4 334 ONOW Lis cr EEZ y e 52 MOVEDITWL SHOLINOW ano 194145 5 MVC 5 MONITORS Centro can connect up to three sets of speakers MAIN ALT and ALT 2 and a pair asd siis GE of headphones These buttons are interlocked so pressing one will cancel another The large volume knob acts as the main volume control for all of the speaker sets except the ALT 2 MODE LEFT PHASE MONO on headphones Trims for ALT and ALT 2 create gt SUB an offset in order to match perceived volume CHECK between speaker sets for easier comparisons 12dB ALT 2 8dB trim range is available To make larger adjustments see Taking Account Of Amplifier S ALT 1 Sensitivity on page 7 6dB MAIN The main mute is just under the m
4. MADE IN THE UK TO RESTORE FACTORY BY AUDIENT PLC DEFAULT SETTINGS DEPRESS FOR 2 SECS To make the sub mono press the button on the rear of the remote mono speaker can be connected to ALT 2 To have ALT 2 permenantly set to mono select ALT 2 and press the rear panel MONO button this will then be displayed on the ALT 2 MODE MONO LED In the unlikely event you encounter a problem with the Centro you should first power cycle your unit If the problem persists you can reset the device to its factory default settings by pressing and holding both remote rear panel ALT 2 and SUB buttons for two seconds However two settings are not reset speaker sensitivity levels and setting input sources to MONO TALKBACK TALKBACK Talkback allows you to address performers and deliver praise or chastisement as you see fit When you open the talkback circuit the speaker dim will automatically come on This cuts down on the shock and ear ringing frequently caused by unwanted feedback To help avoid the embarrassment of cursing a musician while the talkback is on the TALKBACK button responds to button presses in two ways Press to latch the talkback on It will then flash until it is switched off with another press Press and hold to talk only for as long as you hold the button The built in microphone on the Centro remote should be enough for most purposes but it is possible to attach a
5. P il Version 1 02 July 2007 auden 4 Contents Safety Intr idt PER IRI RI RUHK E KIM AERA EVEN I Welcome Connections D A Basic Set up 5 Setting Up 00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 7 Adjusting Input Levels 7 Taking Account of Amplifier Sensitivity 7 Source Sources Grouping Sources Routing Digital Sources To A Digital Recorder Word Clock Using Your Own DAC 0 Cae ee En The REC and F Back Outputs 10 The CUE Outputs 10 CUE to CUE 2 Setting Up A Cue Mix Monitor Contrl 153 Speaker Selection 13 Volume and Trims 13 Mutes 13 PHASE 8 MONO 13 DIM 13 Using a Sub 14 Brides WM REPEP E Adding a second Talkback Mic 15 Phantom Power For The Second Mic 15 Adjusting The Talkback Mics Gains l6 Using The Footswitch l6 cerae M a Block MA lcgi m n
6. RN RR Attenuation MAIN SPEAKER O P Trim Control v Attenuation ALT SPEAKER O P UNCAL L 11 9 RON UNCAL L N N Speaker Select Attenuation Mono on Left c ALT SPEAKER 2 O P 2 0 Remote Phones TE Hones op o ource Select mam m m m m m m m m m m m m m m m m m m TR E FB MIX THRU 1 6 REC 1 or SRC _ He 7 7 Ew CUE O P 5 me to Cue 2 F BACK or SRC 1 CUE 2 O P Cue 2 o V 3 Mono Analogue Stereo Analogue Internal Talkback Mic Stereo ae ie TALKBACK Contro Wr PETS SUMUS Your Centro has been manufactured to a high standard using quality components If correctly installed and operated the unit should give years of problem free operation However in the event of a defect in material or workmanship causing failure of the unit within year of the date of original purchase we will agree to repair or at our discretion replace any defective item without charge for labour or parts To receive service under this warranty it is necessary to return the unit to an Audient authorised service centre or to the factory with a dated receipt as proof of purchase After repair the unit will be returned to you free of charge This wa
7. ain volume knob This mutes both speakers If you d rather just mute one there are individual mutes just lert under the Speaker Select buttons The PHASE and MONO buttons can be useful for checking out strange stereo imaging or for testing mono compatibility To make sure that you don t accidentally leave it on the PHASE button responds to button presses in two ways Press to latch the phase button on It will then flash until it is switched off with another press Press and hold to switch the phase only for as long as you hold the button The MONO button sums the signals in the Left and Right channels You can choose whether to check mono signals on both speakers or on just the left speaker using the switch on the front panel of the rack box DIM reduces the speaker level by a preset amount You can choose just how much like it to attenuate by like so Press and hold the DIM button until it flashes Release it Set the required amount of attenuation using the main volume knob Press the DIM button again Centro s ALT 2 speaker output can be used to provide a full range signal for a sub To activate the sub select the appropriate monitor output and press the SUB button on the rear of the remote The SUB light will illuminate under the ALT 2 trim control which is now deactivated ALT 2 MODE can differ between MAIN and ALT outputs ALT 2 MODE mau ER REMOTE LINK au Cl e Nt MONO SUB
8. e attached every available digital output in your studio to your Centro how do you record digitally from one source to another That s where the digital output comes in it allows you to route one of your digital sources to a dedicated digital output Dead useful for copying to DAT or putting a CD onto your DAW The selected source will feed the digital output irrespective of the current monitoring selection So you can listen to what you re recording the recorder s playback an analogue source or just relax in silence To select a source for the digital output Press and hold the DIG OUT button The Digital input select switches now show the selected source being fed to the digital output Make your selection Release the DIG OUT Button 8 To ensure Word Clock synchronisation with all of your sources set your receiving device to receive embedded clock from its input signal Alternatively ensure that all of your digital devices follow a central master clock Centro uses embedded Word Clock from the selected digital source This keeps things simple if you don t have a master clock and allows you to incorporate devices such as CD players which may not have a Word Clock input We re sure you ll be suitably impressed with Centro s Digital to Analogue Converters If however youd like to use your own trusty converters then be our guest To do so just connect the Centro Digital output to your DAC s input Then use the digital output sw
9. itching described above to select the desired digital source By monitoring the output of your DAC on one of Centro s analogue inputs you can listen to the source using your chosen converters Being a performer is a tricky business and it helps if you can hear what you re doing Centro makes setting up simple cue mixes easy with its dedicated Cue section CUE While any source can be used to feed the Cue section there CED are two dedicated analogue sources designed specifically for this purpose REC is usually the source to be recorded e g a performer s microphone while F BACK Foldback is normally used as playback for the performer e g a click track backing track or a separate foldback mix from your DAW CO cueiro button on each of these sources allows a single sided srce P mono source such as a microphone to be fed to both sides of the headphones It can also be useful for performers who prefer to only wear one headphone as stereo material can be summed so EIS TEM that useful cues panned to one side are not missed As the REC source is likely to be something that you wish to record Centro has a dedicated analogue REC output which you can use to feed your recorder usually your DAW A switch on the front panel of the rack unit allows you to select whether the REC output is fed from the REC input or from the control room selection Similarly the F BACK source is direct
10. ly routed to the F BACK output This could be useful if you wish to send your DAW mix to both the F BACK and MIX inputs Each CUE output can select its source from either its dedicated feed or from the currently selected control room source CUE can take its source from either REC or the selected control room source SRC CUE 2 can take its source from either F BACK or the selected control room source SRC The LISTEN buttons on each Cue output allow you to check the mix on the control room speakers or on your own pair of headphones so you can check what the singer s moaning about In most applications the two Cue outputs will be used together to provide a variable mix for the performer controlled within Centro To do this simply press the CUE to CUE 2 button When this button is active CUE 2 acts as a master fader with CUE 2 s source now set at a fixed level CUE 15 source level can be varied using its volume control With Cue to Cue 2 pressed the mix of Cue sources is routed to both Cue outputs Thankfully the diagrams opposite make it all much simpler OK so how do we make this all work in a recording situation In the example on the next page a singer s microphone is plugged into a preamplifier an Audient 5 008 for example whose analogue output is fed into the REC input of Centro The playback from the DAW comes into Centro s MIX input We ve also connected the performer s headphone amplifier to the CUE 2 o
11. n could be a little button by the sofa at the rear of the control room so everyone can contribute their opinions Why not connect a few buttons in parallel around the studio so you can always chat to a performer while you re at the patchbay or tweaking your outboard Balanced Line Inputs Nominal Input Level Maximum Input Level Crosstalk Left Right Unbalanced Line Inputs Nominal Input Level Maximum Input Level Crosstalk Left Right Talkback Microphone Gain Phantom Power Crosstalk Between Inputs Maximum Output Level Crosstalk Between Cue Outputs Crosstalk Between Monitor Outputs Digital Input Level Analogue Frequency Response THD Noise 4dBu IkHz Maximum Signal to Noise Ratio Digital Frequency Response THD Noise 4dBu IkHz Dynamic Range Dimensions mm Remote Rack Weights Remote Rack 4dBu 20dBu gt 85dB 104 6dBV gt 75dB 25 to 60dB 18V gt 80dB 20dBu gt 80dB 1104 OdBFS 184 0 0 3 dB lOHz to 40kHz 0 002096 1104 0 0 3 dB lOHz to 40kHz 0 003596 AES Input 96kHz Unweighted 1044 AES Input 96kHz Unweighted 240W x 155 x 45D 2U Rack 220 D 0 9 kg 5 kg DIG I P DIG I P 2 DIG I P 3 DIG I P 4 DIG I P 5 DIG I P 6 I P ST I P ST I P 2 ST I P 3 F B MIX I P REC I P T B MIC DIGITAL SELECT Digital O P Select CELLS Alan MUTE Left MUTE Right 27 m Phase Left Mono SUB SSeS
12. nalogue Converter DAC Because of this no more than one digital source may be included in a group There is also a single DIGITAL level trim on d the 1 box rather than one for each device Digital sources can use sample rates of up to 192kHz and bit depths of up to 24 bits DIG 3 ST2 F BACK E SES Sometimes it can be handy to group more than one source together For example let s say you want to practice a keyboard part along with the playback from your DAW Easy DIG 5 Press and hold one of the source buttons In this case Digital for our DAT machine DIG 6 DIG OUT gt Whilst holding pressing any other Source Select button will add it to Ld the group Pressing again will release it from the group an Remember that you can only have one digital source in a group To go back to just selecting one source at a time double tap any of the Source Select buttons To recall your group double tap any of the group s members To remove a source from the group Press and Hold the Source Select button of one of the sources you wish to keep in the group Whilst still holding press the Source Select button of the source you wish to remove from the group Its light should go out Release the first button If you release all of the sources from the group you will automatically return to selecting one source at a time and nothing will happen when you double tap a Source Select button Now that you v
13. olling and back talking We don t mean to be patronising but there are three ways to press buttons on Centro Press This is the most common just press and release as you would expect Press and Hold Fairly self explanatory Sometimes you ll press and hold until something happens and other times you will keep your finger on the button while you do other things Double Tap Two presses in quick succession This is used for hiding and recalling Source Selection groups More on this later Throughout this manual we refer to your Digital Audio Workstation or DAW for short It s just our way of saying your audio equipped computer probably using something like Pro Tools Logic or Nuendo Centro will more than happily work with any kind of DAW so don t worry if we don t mention your specific system The rear of the Centro rack has numerous connection types for the whole gamut of equipment you might wish to connect The rear panel legend uses 1 for an input and O P for output The diagram opposite shows which signal type and level is used by each connection Nominal and maximum input levels for analogue inputs are shown in the Specification section of this manual Digital sources can use sample rates of up to 192kHz and bit depths of up to 24 bits The diagram on the following page shows the audio connections of a typical studio set up A number of digital and analogue sources are connected The DAT recorder is able to record fr
14. om any of the digital sources by being connected to the DIGITAL SELECT O P The DAW system plays back into the MIX input and records from the REC O P The performer s mic pre feeds the REC input and can then be routed to the REC O P for recording by the DAW The performer s headphone mix is sourced from CUE 2 O P Two sets of monitors are connected to the MAIN SPEAKER and ALT SPEAKER outputs In place of a third pair of speakers a sub is connected to the ALT SPEAKER 2 output S P DIF Optical 4dBu Line Level O S P DIF Coaxial OdBV Line Level ST 4 ST I P 1 CUE 2 O P L Dam I P D TEN F B MIX I P Bo REC I P L 3 AL I Ps T B SW ENLEVER UDIENT PLC ag w REMOTE LINK ur 2 zer 645 ELECTRIC SHOCK DO NOT OPEN MADE IN THE UK BY AES EBU Analogue Connections Digital Connections ALWAYS REPLACE WITH SAME FUSE TYPE 2 T B MIC CUE 1 O P F B MIX THRU ALT SPEAKER 1 O P ALT SPEAKER 2 O P MAIN SPEAKER O P 1 AC 50 60Hz 50 WATTS 4dBu Line Level Microphone Input REC O P SP VG a cC cw I mE CX L R L R L R R L R L R L R L FUSE SJ403IUO A SJOPUOW qns f S Jeullojleg sS hi 1 1 4 1
15. rranty does not cover damage resulting from accident or misuse The warranty is void unless repairs are carried out by an authorised service centre The warranty is void if the unit has been modified other than at the manufacturers instruction The warranty does not cover components which have a limited life and which are expected to be periodically replaced for optimal performance We do not warrant that the unit shall operate in any way other than as described in this manual
16. s a handy way of attenuating the levels sent to each speaker output amp The output attenuation control is purely intended to take account of amplifier sensitivity Use the ALT speaker trims to adjust for different speaker sets SOURCE SELECT Press and hold the MAIN speaker select button until the source GLA selection area changes Use the Digital Source Select buttons to attenuate from 0 15 m mie in 3dB steps as shown opposite Select a setting for which your normal listening level will be at about 2 O Clock 6dB D Once you have made your selection press any speaker select 9dB J switch to return to normal mode E J Repeat steps 1 3 for Alt and Alt 2 speakers with trim controls TE Em set in the middle 154 Centro can select from up to 12 stereo sources 6 digital and 6 analogue Sources can be auditioned individually or as part of a group group of sources can also be stored and recalled with a single command SOURCE SELECT Some of Centro s 6 analogue sources are named for ease of use MIX is intended for the main mix from your workstation REC is usually the source to be recorded e g a performer s microphone while F BACK Foldback is normally used as playback for the performer e g a click track or backing track The REC and sources can also be used to feed the Centro s Cue Mixes DIG 1 MIX REC Centro s 6 digital sources share a single Digital to A
17. second microphone on the rear of the rack unit This could be handy if you attach an omnidirectional microphone to cover the back of the control room then the drummer can chime in about a vocal performance without leaving the comfort of the studio sofa If you would like to use a capacitor mic as your second talkback mic Centro can provide a Phantom Power supply To activate this you ll have to open Centro rack unit To activate use the jumper provided to bridge the pins highlighted on the diagram below Jumper for 18 Phantom Power CENTRO 30101 1 aucien The Centro rack unit will provide up to 18 This should prove sufficient for most modern microphones but do check your microphone specification before use The gain control for the microphone in the Centro remote is at the top of the Talkback section To adjust the gain for a second microphone on the front panel of the Centro rack unit you ll find a little screw adjust control labelled TALKBACK The Centro rack has a footswitch socket so that you can wire up a footswitch to open the talkback When pressed this functions just like the button on the Centro remote so a Press will cause the talkback to latch while a Press and Hold will keep the talkback open as long as you hold the button You don t have to use a footswitch You could just as easily wire a doorbell button or even a motion sensor anything that will close the circuit to function A useful applicatio
18. utput Finally to complete the circuit the REC Output is fed to the DAW to be recorded To do this we have set the front panel REC O P switch to REC On the Centro remote we have selected REC as the source for CUE and SRC as the source for CUE 2 The main source selection is set to MIX To mix the sources together we ve selected CUE to CUE 2 As we can see opposite varying the CUE 2 volume will change the overall level sent to the headphones while changing the CUE volume will alter the microphone level against the playback If you d like to use the Centro remote s headphone amplifier for your performer s headphones just press LISTEN under CUE 2 and switch the PHONES ON Of course this will override your speaker selection CUE I O P CUE 2 O P 100 REC I P T 10096 10096 SOURCE SELECT F BACK I P e F BACK CUE 1 To qu T 40 dle 10096 h SOURCE SELECT Figure 1 Basic Configuration CUE O P CUE 2 O P 40 1 40 40 114096 REC I P zx NC 1 SRC 10096 zl 10096 SOURCE SELECT F BACK I P e F BACK 4096 10096 SOURCE SELECT Figure 2 Cue to Cue 2 in action CUE I O P CUE 2 O P REC I P _ 1 SRC lt 10096 SOURCE SELECT F BACK I P e F BACK 10096 SOURCE SELECT Figure 3 Cue 1 to Cue 2 with different levels seuoydpesH s JeulJoJIod pM 1431
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