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Summary of Contents for Cedar DNS1500
- Page 1 DNS1500 dialogue noise suppressor OWNER’S MANUAL © 2007 Audio Ltd CEDAR Manual version 1.00: September 2007 interstage Phistersvej 31, 2900 Hellerup, Danmark Telefon 3946 0000, fax 3946 0040 www.interstage.dk - pro audio with a smile Page 1...
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Page 3: Table Of Contents
Table of Contents Introduction ....................5 Safety Instructions ..................6 Setting up the DNS1500 ................7 Unpacking ....................7 Installation Site ..................7 Brightness Control .................. 7 Creating A Default Setup ................ 7 Audio Connection ..................8 Connections ................... 8 Locking and lock Indicator .............. - Page 4 Intentionally left blank Page 4...
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Page 5: Introduction
Quality, speed and simplicity are paramount considerations in the DNS1500 design, and its features include the following: Near zero latency The DNS1500 has a group delay of less than 10 samples (typically less than 1/200 of a frame) so there is no loss of lip-sync when using it. -
Page 6: Safety Instructions
Read these instructions, and follow them. Water and moisture The DNS1500 must not be exposed to rain or moisture. Furthermore, if it is brought directly from a cold environment into a warm one, moisture may condense inside it. This, in itself, will not cause damage, but may cause electrical shorting. -
Page 7: Setting Up The Dns1500
You may replace the factory default setup, which comprises the settings for: which channels are active for prccessing, the range(s), the Bypass status and the LED brightness. To do so, shut down the DNS1500 by holding the Bypass button for two seconds or more. Page 7... -
Page 8: Audio Connection
The standards are: Digital SPDIF format Digital AES/EBU format The DNS1500 is not affected by channel status data. It will echo any such data directly to the outputs. LOCKING AND LOCK INDICATOR The DNS1500 will by default lock to any AES/EBU signal presented to the rear panel AES/EBU input. -
Page 9: Front Panel Indicators And Controls
FRONT PANEL INDICATORS AND CONTROLS Channel Selectors You can use the DNS1500 to process channel 1, channel 2, or both channels presented to the active input. Range Selector The Range Selector concentrates the unit’s activity into the desired part of the audio spectrum. -
Page 10: Operating The Dns1500
OPERATING THE DNS1500 Introduction The DNS1500 divides a signal into a large number of well defined bands. Sophisticated digital filters analyse each of these bands and suppress the noise independently in each. The innovative design of this filter bank allows you to control the DNS1500 using relatively few front panel controls. - Page 11 Band Gain controls Once you have chosen the range(s) and determined the Level, you control the action of the DNS1500’s filter bank using the Band Gain controls. The six faders represent six frequency bands distributed from lower frequencies (left) to higher frequencies (right) across the selected range.
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Page 12: Case Studies
CASE STUDIES The following case studies describe just three of the ways in which you can use the DNS1500. You can apply the DNS1500 equally to recorded signals and to ‘live’ signals at the point of recording or transmission. SUPPRESSING TRAFFIC NOISE... - Page 13 If this proves difficult, you can return the Band Gain controls to -24dB for this stage. The DNS1500 takes a short period to “settle” after moving the Level control (especially in the lower ranges) so you should not adjust it rapidly.
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Page 14: Suppressing Tape Hiss
SUPPRESSING TAPE HISS The DNS1500 can suppress the tape hiss that mars many older recordings. It will also improve the signal/noise ratio of dialogue tapes that have been poorly copied as well as those that are many generations old. First, identify the frequency range(s) in which the noise lies. -
Page 15: Suppressing Excessive Reverberation
Second, set the Band Gain controls. You should set all six Band Gain controls to -24dB. This will ensure that (provided the other controls are set correctly) the DNS1500 processes the “tails” of the sound without adversely affecting the desired signal. - Page 16 Intentionally left blank Page 16...
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Page 17: Specifications
Processor power: 120 Mflops Latency: <10 samples Process resolution: 40 bits EMC REGULATIONS In order to comply with EMC regulations, you must connect the DNS1500 using metal-shelled connectors and good quality shielded cable suitable for digital audio. Declaration of conformity... -
Page 18: License And Limited Warranty
In this Licence and Limited Warranty the following words and phrases shall bear the following meanings: ‘the Company’ is CEDAR Audio Limited of 20 Home End, Fulbourn, Cambridge CB21 5BS, UK; ‘the System’ means an instance of the DNS1500 sound-reprocessing system comprising hardware and software held on non-volatile memory (‘firmware’) developed by the Company;... - Page 19 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 omission on the part of either party to exercise any right that it may have under this Licence operate as a waiver of any breach or default by the other party.
- Page 20 CEDAR DNS1500 Inspected: QC Engineer: Serial number: interstage Phistersvej 31, 2900 Hellerup, Danmark Telefon 3946 0000, fax 3946 0040 www.interstage.dk - pro audio with a smile Designed and manufactured by CEDAR Audio Ltd 20 Home End Fulbourn Cambridge CB21 5BS United Kingdom www.cedaraudio.com...