Junger B42 Manuel utilisateur

4ch digital dynamics processor

b42

release 2.1.0

FOREWORD

The information contained in this manual is subject to change without notice.

This manual is the copyright of Jünger Audio. All reproduction and copying, other than for legal owner’s

personal use, or disclosure of part or whole to a third party, is not allowed without prior written

Thank you for buying and for using the 4-channel Digital

Dynamics Processor b42.

Not only you have aquired the latest generation of digital

dynamic range processing, but also a piece of equipment which

is unique in its design and specification.

Please read this manual carefully to ensure you have all the

information you need to use the 4-channel Digital Dynamics

Processor b42.

The unit was manufactured to the highest industrial standards

and went through extensive quality control checks before it was

supplied.

If you have any comments or questions about installing, setting-

up or using the b42, please do not hesitate to contact us.

authorization by Jünger Audio. © Jünger Audio, Berlin 1998-2004

CONTENTS

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

2. Function description .......................................….

2.1 Basic description ...........................................

2.2 Block diagram .............................................

2.3 Audio signal processing ................................

2.3.1 Gain ......................................................

2.3.2 Expander …………………………………

2.3.3 Deesser ………………………………….

2.3.4 Compressor ……………………………...

2.3.5 Limiter ……………...................................

2.3.6 Program …….. .......................................

2.3.7 Transparent mode ................................

2.4 The Jünger Audio Dynamics Principle ..........

2.4.1 Selection of parameters to increase

loudness ….................................................

2.4.2 Influence of signal delay time …............

3-1

3-2

3-3

3-4

3-5

3. Installation .........................................................

3.1 Unpack the unit ...........................................

3.2 Power supply ................................................

3.3 Connections ...........................…...................

3.4 Rack mounting ..........................…................

3.5 Operation safety ..........................……..........

3.6 Synchronization of digital output ..….............

3.7 Remote Control ..................……...................

3.7.1. GPI Remote Control ......…….............

3.7.2. Tally Out .............………....................

3.7.3. Serial Remote Control .......…….........

4. Location of parts and controls ............………......

4-1

4-3

4-4

4-5

4.1 Front panel ......................……......................

4.2 Rear panel ...........................………..............

4.3 Switches and jumpers for configuration ........

4.4 Selection of SDI Split Mode ......…….............

4.5 Selection of SDI audio group ........................

5. Operation ...............................................................................

5.1 adjustment of parameters …………………………………..

5.2 gain menu ……………………………………………………

5.3 mode menu …………………………………………………

5.4 expander menu ………………………………………………

5.5 de-esser menu ………………………………………………

5.6 compressor menu …………………………………………..

5.7 limiter menu …………………………………………………

5.8 utility menu …………………………………………………

5.9 recall and storage of presets ……………………………..

5.10 editing of presets …………………………………………

5.11 list of factory presets ……………………………………..

6. Boot display and trouble shooting ............................................

6.1 Boot display .......................................................................

6.2 Error messages and trouble shooting ................................

6.3 Initialization the unit ............................................................

7. Application notes ......................................................................

5-1

5-2

5-4

5-5

5-6

5-7

5-8

6-1

6-2

7-1

8-1

9-1

7.1 B40 series with SDI interface .............................................

7.2 Basic working modes with SDI ...........................................

8. Technical specifications ...........................................................

9. Warranty and service information ...........................................

2. FUNCTION DESCRIPTION

FUNCTION DESCRIPTION

2.1

BASIC

DESCRIPTION

The digital dynamics processor b42 is a professional studio

device that processes the dynamic range of digital audio

signals.

The dynamic range processor principles developed by Jünger

Audio enable compressors, limiters and expanders to be

produced with exceptionally high audio quality, without

coloration, pumping, breathing, distortion or modulation effects

sometimes associated with this type of processor.

In short, almost inaudible processing - with ease of use. The

outstanding quality of the processing is based on the Multi-Loop

dynamic range control principle developed by Jünger Audio.

The unit is easy to operate and requires only a limited number of

settings to be made by the user to achieve optimum results. All

other parameters necessary for inaudible processing are

continuously automatically controlled in response to changes in

the programme signal.

features

• 4-channel digital dynamics processor

• various link modes: 4-ch, stereo 1/2 or 3/4, ch1...4

independent

• adjustable input gain (channel independent) -15...+15 dB

• adaptive controlled dynamic range processing

expander on/off, THRS -50...-20 dBFS, REL ...

de-esser on/off, TYPE male/female, RNG -20...0 dB

compressor on/off, RATIO 1,0:1...4,0:1, RNG 0...15 dB

limiter on/off, THRS 0...-20 dBFS, PROgram 1..4

• user friendly preset and recall function (10 presets)

• pairwise bit transparent mode input to output

• extern sync mode, AES/EBU or VIDEO (or SDI if

optional SDI-interface is present)

• RS-422 interface for serial remote

• GPI interface for parallel remote control, tally output

operation manual b40, chapter 2 -Function description- page 2-1

2. FUNCTION DESCRIPTION

2.2

BLOCK DIAGRAM

page 2-2 operation manual b40, chapter 2 -Function description-

2. FUNCTION DESCRIPTION

2.3

AUDIO SIGNAL

PROCESSING

All signal processing is done in the digital domain by Texas

Instruments floating point signal processors. The use of 32 bit word

length for calculation ensures that there is no deterioration in signal

quality, even if an audio signal with a maximum word length of 24 bit is

input into the processing of the unit.

GAIN means linear amplification of input or output signals. The input or

output gain can be changed in steps of 0.1 dB , within a range from -

15...+15 dB.

Adjustment of GAIN is channel independent.

Below an adjustable threshold level an expander can be activated

which can lower the amount of noise signals.

1:4.0

OFF

ratio

-50

-40

-30

-20

-10

[dBFS]-10-20-30-40-50-60

output

input

range

20 dB

threshold

level

-20...-50, off

The de-esser is a special processing function to reduce S-

frequencies of speakers. This can be done either by using a

compressor with frequency selective side chain, or by dynamic filtering

of voice signals.

The de-esser of the b42 uses a sophisticated dynamic filtering

algorithm for the reduction of S-frequencies. The dynamic filter makes

it possible to reduce these frequencies without influencing other

spectral parts, and works independent of the signal level.

The critical S-frequencies are different for female and male voices.

Only two basic adjustments are necessary for the de-esser - filter

frequency and the amount of s-reduction (range).

All other parameters which are necessary for effective de-esser

function are controlled by the audio signal itself.

The threshold of the de-esser is automatically set and follows the

signal power level. The reduction of S-frequencies can be controlled

by setting the range parameter from 0...-20dB.

2.3.1

GAIN

2.3.2

EXPANDER

fig. 2:

static

characteristics:

expander

2.3.3

DE-ESSER

operation manual b40, chapter 2 -Function description- page 2-3

2. FUNCTION DESCRIPTION

filter

frequency

1..14kHz incl.

male/female

S-reduction

range 0...-20

frequency

-50

-40

-30

-20

-10

[dBFS]

20k

10k1k500100

Input

level

auto

threshold

function

fig.3:

basic function:

de-esser

2.3.4

COMPRESSOR The compression of the programme signal takes place evenly over

the entire input level range and not only at the upper end above a

certain threshold level. Dynamic structures of the input signal (e.g.

dynamic evolutions) are converted proportionally so that even after

compression the ratios are maintained, only slightly condensed,

leaving on the whole a transparent, seemingly uncompressed sound

impression.

fig.4:

static

characteristics:

compressor

2.0:1

1.6:1

1.3:1

OFF

ratio

-50

-40

-30

-20

-10

[dBFS]-10-20-30-40-50-60

output

input

range

max. 15dB

Compression (reduction of the dynamic range of the input signal to

match the dynamic range of the storage or of the transmission system)

is partly achieved by increasing the level of low level signals, the

lowest of which might otherwise be below the noise floor of the audio

system.

The lower the input signal level the higher the additional gain

applied to that input signal by the compression processing will be.

page 2-4 operation manual b40, chapter 2 -Function description-

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