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Summary of Contents for Cedar BRX+
- Page 1 CEDAR + debuzzer + azimuth corrector Digital Audio Restoration Modules OWNER’S MANUAL © 1999 Audio Ltd CEDAR Manual version 1.00: February 1999 interstage Phistersvej 31, 2900 Hellerup, Danmark Telefon 3946 0000, fax 3946 0040 www.interstage.dk - pro audio with a smile...
- Page 2 In this Licence and Limited Warranty the following words and phrases shall bear the following meanings: ‘the Company’ means Audio Limited of 9 Clifton Court, Cambridge CEDAR CB1 7BN ‘the System’ means an instance of the sound-reprocessing system comprising hardware and software held on (‘firmware’) developed by the Company;...
- Page 3 beyond its reasonable control including, but not limited to, fires, strikes (of its own or other employees), insurrection or riots, embargoes, container shortages, wrecks or delays in transportation, inability to obtain supplies and raw materials, or requirements or regulations of any civil or military authority. WAIVER The waiver by either party of a breach of the provisions hereof by the other shall not be construed as a waiver of any succeeding breach of the same or other provisions, nor shall any delay or...
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Page 5: Table Of Contents
TABLE OF CONTENTS PART 1 Operations manual INTRODUCTION ........2 SAFETY . -
Page 7: Operations Manual
PART 1 Operations manual... -
Page 8: Introduction
INTRODUCTION Thank you for purchasing this Series X+ audio restoration module. CEDAR It is one of a family of the world’s most advanced and most effective noise removal units, and it offers outstanding processing power and performance. The full range consists of the: + debuzzer Removes a wide range of buzzes and hums from any audio material;... -
Page 9: Safety
SAFETY INSTRUCTIONS Read these instructions, follow them, and save them for future reference. Water and moisture The unit must not be exposed to rain or moisture. Furthermore, if the unit is brought directly from a cold environment into a warm one, moisture may condense inside it. -
Page 10: Setup
SETUP Unpacking Unpack the Series X+ carefully. Save the carton and all packing materials since you may need them to transport the unit in the future. In addition to the Series X+ and the packaging, the carton should contain the following: mains connection lead this manual rack mounting hardware... -
Page 11: Audio Connections
AUDIO CONNECTIONS The Series X+ offers two audio connection standards, and passes its signal to both outputs irrespective of the input used. The standards are: Digital format audio data SPDIF is used by domestic and semi-professional digital audio devices. SPDIF You should connect the output from your source to the input of... - Page 12 PAGE 6...
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Page 13: Front-Panel Indicators And Controls
FRONT-PANEL INDICATORS AND CONTROLS Power switch When , the Series X+ is in standby mode. When , the Series X+ is powered up and operational. The unit is not powered off completely unless the power lead is removed. Input selector and When , the input is selected. - Page 15 + debuzzer...
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Page 16: Operating The Brx+ Debuzzer
Introduction ’s buzz and hum removal process uses information about the fundamental CEDAR frequency and the overall volume of the buzz or hum to identify, up to a limit of 4kHz, all the harmonics that constitute the noise. It is left to the user to determine how much of that noise is then removed. - Page 17 Coarse adjustment If you do not know the fundamental frequency, you will need to ‘hunt’ for it. Alternatively, you may know the frequency, but it does not lie close to one of the presets. In both these cases you will wish to adjust the control in coarse FREQUENCY steps.
- Page 18 If you encounter a signal damaged in this way, you should perform multiple passes using the +, or a single real-time pass on a for Windows CEDAR system. PAGE 12...
- Page 19 + azimuth corrector...
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Page 20: Operating The Azx+ Azimuth Corrector
OPERATING THE AZX+ AZIMUTH CORRECTOR Introduction ’s Phase/Time correction process uses information common to the left CEDAR and right channels of a stereo signal to determine the offset between the channels. It then recreates the signal with sub-sample accuracy so that the channels are correctly aligned. - Page 21 Modes of operation + offers two primary modes of operation – – plus a AUTO MANUAL quick facility: RESET mode AUTO Press and rotate the knob until the screen flashes the word ‘Auto’. ADJUST When you release the knob, the central tracking light (in the far left ADJUST of the display) will flash and the unit will be in mode.
- Page 22 If the red, upward-pointing arrow is lit, you can turn the knob ADJUST clockwise to move closer to the autotracker value. If the downward-pointing arrow is lit, you can turn the knob ADJUST anticlockwise to move closer to the autotracker value. Note: If the central green is lit alone then the displayed is within a quarter...
- Page 23 Tutorial mode is selected and the unit is in , the + will act purely as a AUTO phase meter, and it will then be apparent when you have timing errors in any material you pass through it. If you detect timing errors and wish to correct them, the suggested procedure is as follows: Ensure that the + is in...
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Page 24: Specifications
Declaration of conformity Date of issue 1 February 1999 Equipment ‘Series X+’ CEDAR Manufacturer Audio Ltd CEDAR Address 9 Clifton Court, Cambridge, CB1 7BN This is to certify that the aforementioned equipment, when used in accordance... -
Page 25: An Introduction To Audio Restoration
PART 2 An introduction to audio restoration... -
Page 26: Buzz Removal
‘ticks’ is best restored using one of ’s CEDAR various decrackle (time domain) processes, and we will not consider it further here. On the other hand, a buzz that has an indistinct time domain structure may be more easily characterised by its harmonic content and then analysed and treated in the frequency domain. - Page 27 Figure 1 Figure 2 Figure 3 PAGE 21...
- Page 28 (Figure 5). ’s Debuzz process precisely fulfils this specification. It will track buzz CEDAR frequencies within a range of 2% at 50Hz, and will retain genuine signal components while removing any buzz harmonics that exist at the same frequencies.
- Page 29 Figure 4 Figure 5 PAGE 23...
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Page 30: Azimuth Correction
AZIMUTH CORRECTION ’s first version of the Azimuth Corrector was called the Phase/Time CEDAR Corrector, and ran on the -2 Production System, an early -based suite of CEDAR processes that ran under . This was developed primarily for the broadcast and video industries, for whom mono compatibility is of great concern. - Page 31 Figure 1 Figure 2 Figure 3 Figure 4 PAGE 25...
- Page 32 CEDAR It does this by identifying any monophonic component in the stereo sound and then measuring the timing difference between the left and right channels of the signal.
- Page 33 Figure 5 Figure 6 PAGE 27...
- Page 34 ’s processes detect and correct. CEDAR The second effect is the smearing caused by the length of tape covered – again in the direction of tape travel – by the offset head. In general terms, the head will then ‘average’...
- Page 36 CEDAR Series X+ Serial number: Inspected: QC Engineer: Designed and manufactured by Audio Ltd CEDAR 9 Clifton Court Cambridge CB1 7BN United Kingdom interstage Phistersvej 31, 2900 Hellerup, Danmark Telefon 3946 0000, fax 3946 0040 www.interstage.dk - pro audio with a smile...
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