Dolby Laboratories 585 User Manual

Model 585

Time Scaling Processor

Issue 2 Part Number 91796

Corporate Headquarters

Dolby Laboratories, Inc.
100 Potrero Avenue
San Francisco, CA 94103-4813
Telephone [phone]
Fax [phone]

www.dolby.com

European Headquarters

Dolby Laboratories, Inc.
Wootton Bassett
Wiltshire, SN4 8QJ, England
Telephone [phone]
Fax [phone]

Model 585 Time Scaling Processor

Dolby Laboratories, Inc.

DISCLAIMER OF WARRANTIES:

EQUIPMENT MANUFACTURED BY DOLBY LABORATORIES IS WARRANTED AGAINS T DEFECT S IN
MATERIALS AND WORKMANSHIP FOR A PERIOD OF ONE YEAR FROM THE DATE OF PU RCHASE .
THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES AND NO WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR OF NONINFRINGEMENT OF
THIRD-PARTY RIGHTS (INCLUDING, BUT NOT LIMITED TO, COPYRIGHT AND PATENT RIGHTS).

LIMITATION OF LIABILITY:

IT IS UNDERSTOOD AND AGREED THAT DOLBY LABORATOR I ES’ LI ABILITY, WHETHER IN
CONTRACT, IN TORT, UNDER ANY WARRANTY, IN NEGLIGENCE, OR OTHE RWISE SHALL NOT
EXCEED THE COST OF REPAIR OR REPLACEMENT OF THE DEFECTIVE COMPONENTS OR ACCUSED
INFRINGING DEVICES, AND UNDER NO CIRCUMSTANCES SHALL DOLBY LABORATORIES BE
LIABLE FOR INCIDENTAL, SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES,
(INCLUDING, BUT NOT LIMITED TO, DAMAGE TO SOFTWARE O R RECORDED AU DI O OR VISUAL
MATERIAL), COST OF DEFENSE, OR LOSS OF USE, REVENUE, OR PROFIT, EVEN IF DOLBY
LABORATORIES OR ITS AGENTS HAVE BEEN ADVISED, ORALLY OR IN WRITING, OF THE
POSSIBILITY OF SUCH DAMAGES.

Dolby and the double-D symbol are registered trademarks of Dolby Laboratories. Part Number 91796
All other trademarks remain the property of their respective owners. Issue 2
 2003 Dolby Laboratories, Inc. All rights reserved. S03/14154/14618

ii

Model 585 Time Scaling Processor

Table of Contents

List of Figures................................................................................................................v

List of Tables .................................................................................................................v

Regulatory Notices....................................................................................................... vi

Fusing Information ...................................................................................viii

Chapter 1 Introduction........................................................................................... 1-1

Chapter 2 Getting Started......................................................................................2-1

2.1 Unpacking and Inspection............................................................ 2-1

2.2 Installing.......................................................................................2-1

2.3 Rear Panel ...................................................................................2-2

2.3.1 Digital Audio Connections ................................................2-2

2.3.2 Serial Connection Ports....................................................2-3

2.3.3 Remote Connection Ports ................................................2-4

2.4 Front Panel...................................................................................2-4

2.4.1 Reading the Display .........................................................2-5

2.4.2 Buttons.............................................................................2-5

2.4.3 Knob.................................................................................2-6

2.5 Status Menu.................................................................................2-7

2.6 Setup Menu..................................................................................2-8

2.6.1 Program Configuration .....................................................2-8

2.6.2 Operating Mode................................................................2-9

2.6.3 System Settings .............................................................2-11

Chapter 3 Time Scaling..........................................................................................3-1

3.1 Transport Menu............................................................................3-1

3.1.1 Play ..................................................................................3-2

3.1.2 Record..............................................................................3-5

3.1.3 Program Selection............................................................3-5

3.2 Time Scaling of Longer Programs................................................3-6

Chapter 4 Pitch Shifting.........................................................................................4-1

4.1 Adjusting the Pitch Shifting Value.................................................4-1

4.2 Using Pitch Shifting to Perform Online Time Scaling....................4-2

Chapter 5 Applications...........................................................................................5-1

5.1 Stand-Alone Processing...............................................................5-1

5.2 Processing with Synchronized Video............................................5-2

iii

Model 585 Time Scaling Processor

Chapter 6 Principles of Operation......................................................................... 6-1

6.1 Multichannel Delivery ...................................................................6-1

6.2 Development of Time Scaling.......................................................6-2

6.2.1 Time-Domain Solutions....................................................6-2

6.2.2 Frequency-Domain Solutions...........................................6-2

6.2.3 Modeling-Based Solutions................................................6-3

6.2.4 Choosing a Solution .........................................................6-3

6.3 Intelligent Analysis........................................................................6-3

Chapter 7 Reference Data......................................................................................7-1

7.1 Channel Mapping .........................................................................7-1

7.2 Specifications...............................................................................7-2

iv

Model 585 Time Scaling Processor

List of Figures

Figure 1 Checking the Main Fuse..................................................................................viii

Figure 2-1 Connections: Signal In and Out...................................................................2-2

Figure 2-2 Connections: Remote RS-232, GP I/O, Metadata In and Out.....................2-3

Figure 2-3 Model 585 Front Panel................................................................................2-4

Figure 2-4 Front-Panel Buttons ....................................................................................2-5

Figure 5-1 Stand-Alone Time Scaling...........................................................................5-2

Figure 5-2 Single-Pass Pitch Shifting ...........................................................................5-3

List of Tables

Table 2-1 Front-Panel Button Definitions......................................................................2-6

Table 2-2 Status Menu Screens................................................................................... 2-7

Table 3-1 Play Menu Button Mapping ..........................................................................3-2

Table 7-1 Channel Mapping according to Program Configuration................................7-1

v

Model 585 Time Scaling Processor

Regulatory Notices

USA

This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipm ent is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not instal led and used in
accordance with this instruction manual, m ay cause harmful interference to radio comm unications.
Operation of this equipment in a re sidential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his or her own expense.

WARNING: Troubleshooting must be performed by a trained technician. Do
not attempt to service this equipment unless you are qualified to do so.

Check that the correct fuses have been installed. To reduce the risk of fire,
replace only with fuses of the same type and rating.

Exposed portions of the power supply assembly are electrically “hot.” To reduce risk of electric
shock, the power cord

must be disconnected when the power supply assembly is removed.

The ground terminal of the power plug is connected directly to
the chassis of the unit. For continued protection against
electric shock, a correctly wired and grounded (earthed) three­pin power outlet must be used. Do not use a ground-lifting
adapter and never cut the ground pin on the three-prong plug.

WARNING: Before applying power, check the main fuse using the procedure on
page viii.

Canada

This Class A digital apparatus complies with Canadian ICES-003.

EU

This equipment complies with the EMC requirements of EN55103-1 and EN55103-2 when
operated in an E2 environment in accordance with this manual.

UK

Use power cord Dolby part number 92031 supplied with unit (pre-fitted with 13A plug to
BS1363) to connect Model 585 to the mains supply. This equipment must be earthed.

vi

Model 585 Time Scaling Processor

IMPORTANT SAFETY NOTICE

This unit complies with the safety standard EN60065. The unit shall not be exposed to dripping or splashing and no objects filled with liquids,
such as coffee cups, shall be placed on the equipment. To ensure safe operation and to guard against potential shock hazard or risk of fire, the
following must be observed:
o Ensure that your mains supply is in the correct range for the input power requirement of the unit.
o Ensure fuses fitted are the correct rating and type as marked on the unit.
o The unit must be earthed by connecting to a correctly wired and earthed power outlet.
o The power cord supplied with this unit must be wired as follows:

Live—Brown Neutral—Blue Earth—Green/Yellow

IMPORTANT – NOTE DE SECURITE

Ce materiel est conforme à la norme EN60065. Ne pas exposer cet appareil aux éclaboussures ou aux gouttes de liquide. Ne pas poser d'objets
remplis de liquide, tels que des tasses de café, sur l'appareil. Pour vous assurer d'un fonctionnement sans danger et de prévenir
tout choc électrique ou tout risque d'incendie, veillez à observer les recommandations suivantes.
o Le selecteur de tension doit être placé sur la valeur correspondante à votre alimentation réseau.
o Les fusibles doivent correspondre à la valeur indiquée sur le materiel.
o Le materiel doit être correctement relié à la terre.
o Le cordon secteur livré avec le materiel doit être cablé de la manière suivante:

Phase—Brun Neutre—Bleu Terre—Vert/Jaune

WICHTIGER SICHERHEITSHINWEIS

Dieses Gerät entspricht der Sicherheitsnorm EN60065. Das Gerät darf nicht mit Flüssigkeiten (Spritzwasser usw.) in Berührung kommen; stellen
Sie keine Gefäße, z.B. Kaffeetassen, auf das Gerät. Für das sichere Funktionieren des Gerätes und zur Unfallverhütung (elektrischer Schlag,
Feuer) sind die folgenden Regeln unbedingt einzuhalten:
o Der Spannungswähler muß auf Ihre Netzspannung eingestellt sein.
o Die Sicherungen müssen in Typ und Stromwert mit den Angaben auf dem Gerät übereinstimm e n.
o Die Erdung des Gerätes muß über eine geerdete Steckdose gewährleistet sein.
o Das mitgelieferte Netzkabel muß wie folgt verdrahtet werden:

Phase—braun Nulleiter—blau Erde—grün/gelb

GB

F

D

NORME DI SICUREZZA – IMPORTANTE

Questa apparecchiatura è stata costruita in accordo alle norme di sicurezza EN60065. Il prodotto non deve essere sottoposto a schizzi, spruzzi e
gocciolamenti, e nessun tipo di oggetto riempito con liquidi, come ad esempio tazze di caffè, deve essere appoggiato sul dispositivo. Per una
perfetta sicurezza ed al fine di evitare eventuali rischi di scossa êlettrica o d'incendio vanno osservate le seguenti misure di sicurezza:
o Assicurarsi che il selettore di cambio tensione sia posizionato sul valore corretto.
o Assicurarsi che la portata ed il tipo di fusibili siano quelli prescritti dalla casa costruttrice.
o L'apparecchiatura deve avere un collegamento di messa a terra ben eseguito; anche la connessione rete deve
avere un collegamento a terra.
o Il cavo di alimentazione a corredo dell'apparecchiatura deve essere collegato come segue:

Filo tensione—Marrone Neutro—Blu Massa—Verde/Giallo

I

AVISO IMPORTANTE DE SEGURIDAD

Esta unidad cumple con la norma de seguridad EN60065. La unidad no debe ser expuesta a goteos o salpicaduras y no deben colocarse sobre el
equipo recipientes con liquidos, como tazas de cafe. Para asegurarse un funcionamiento seguro y prevenir cualquier posible peligro de descarga o
riesgo de incendio, se han de observar las siguientes precauciones:
o Asegúrese que el selector de tensión esté ajustado a la tensión correcta para su alimentación.
o Asegúrese que los fusibles colocados son del tipo y valor correctos, tal como se marca en la unidad.
o La unidad debe ser puesta a tierra, conectándola a un conector de red correctamente cableado y puesto a tierra.
o El cable de red suministrado con esta unidad, debe ser cableado como sigue:

Vivo—Marrón Neutro—Azul Tierra—Verde/Amarillo

E

VIKTIGA SÄKERHETSÅTGÄRDER

Denna enhet uppfyller säkerhetsstandard EN60065. Enheten får ej utsättas för yttre åverkan samt föremål innehållande vätska, såsom
kaffemuggar, får ej placeras på utrustningen." För att garantera säkerheten och gardera mot eventuell elchock eller brandrisk, måste följande
observeras:
o Kontrollera att spänningsväljaren är inställd på korrekt nätspänning.
o Konrollera att säkringarna är av rätt typ och för rätt strömstyrka så som anvisningarna på enheten föreskriver.
o Enheten måste vara jordad genom anslutning till ett korrekt kopplat och jordat el-uttag.
o El-sladden som medföljer denna enhet måste kopplas enligt foljande:

Fas—Brun Neutral—Blå Jord—Grön/Gul

S

BELANGRIJK VEILIGHEIDS-VOORSCHRIFT

Deze unit voldoet aan de EN60065 veiligheids-standaards. Dit apparaat mag niet worden blootgesteld aan vocht. Vanwege het risico dat er
druppels in het apparaat vallen, dient u er geen vloeistoffen in bekers op te plaatsen. Voor een veilig gebruik en om het gevaar van electrische
schokken en het risico van brand te vermijden, dienen de volgende regels in acht te worden genomen:
o Controleer of de spanningscaroussel op het juiste Voltage staat.
o Gebruik alleen zekeringen van de aangegeven typen en waarden.
o Aansluiting van de unit alleen aan een geaarde wandcontactdoos.
o De netkabel die met de unit wordt geleverd, moet als volgt worden aangesloten:

Fase—Bruin Nul—Blauw Aarde—Groen/Geel

NL

vii

Fusing Information

WARNING: To reduce the risk of fire, replace fuses only with the same type
and rating.

The unit uses a universal switching power supply that handles the full range of nominal
mains voltages between 90 and 264 VAC and any frequency between 50 and 60 Hz.

Check Main Fuse

The Main fuse rating is:

T 1A L (1 Amp, 250 V, 20 mm, time-lag, low-breaking capacity) for all operating
voltages.

WARNING: The power to the unit must be off when the following steps are
performed. Ensure that the main power cable to the unit is not connected to a
power source.

Model 585 Time Scaling Processor

1. Open the fuse compartment door in the AC power input housing with a small flat-

blade screwdriver (Figure 1). Carefully pull out the fuse carrier.

Check that the fuse has the correct rating. The fuse carrier must be inserted into

2.
the compartment with the orientation shown in Figure 1.

Do not force the carrier

into the compartment or both could be damaged.

Snap the fuse compartment door closed.

3.

Fuse carrier

Installed fuse

Open the door

Figure 1 Checking the Main Fuse

Internal Fuse

The switching power supply contains a separate fuse. Most fault conditions should be
protected by the main fuse.

If you find it necessary to replace the internal fuse, be certain to replace it with a fuse
of the same type and rating as printed on the switching power supply board.

viii

Model 585 Time Scaling Processor

Chapter 1

Introduction

The Model 585 Time Scaling Processor delivers true time scaling and pitch shifting
for the studio professional.

A change in the playback speed of analog tape—or in the sample playback rate for
digital formats—has always brought about a change in the audio pitch as well as the
duration of the audio program being played. However, this fixed link between
playback speed and pitch has often meant a compromise in audio quality. Therefore,
the ability to precisely determine and alter pitch and program duration
has been a necessity since it first became possible to alter the speed of a recording.

Today, many standard operations result in a change in audio pitch; for example, when
converting a film for broadcast at 25 fps, or adjusting a program’s length to match the
available broadcast time slot.

independently

There have been attempts over the years to provide pitch shifting and time scaling.
Early products showed glaring weaknesses, and more recent attempts have tended to
be useful only on a limited range of material. Model 585 delivers dependable
processing of any signal, across the whole spectrum of audio: music, speech, special
effects, and any combination of these elements.

Multichannel Delivery

Model 585 is the first product to deliver truly phase-synchronous time scaling and
pitch shifting for multiple (up to eight) channels of audio—something multiple stereo
processors cannot achieve. It is important to preserve the phase relationship of
multichannel audio programs for all listeners; it is especially important for those with
stereo or mono reproduction equipment, who hear a summing of the multichannel
elements. Model 585 is compatible with all Dolby

Real-Time Time Scaling and Pitch Shifting

Model 585 delivers two separate functions: time scaling and pitch shifting. Each
function can be applied in real time.

®

E products.

Time scaling alters the duration of an audio signal but leaves the perceived pitch
unchanged from the original signal. Time scaling and how to implement it using
Model 585 is discussed in Chapter 3.

1-1

Model 585 Time Scaling Processor Introduction

Pitch shifting, sometimes referred to in other documents as pitch scaling, alters the
perceived frequency of the audio signal from that of the original signal, while leaving
the duration of the signal the same as the original. Pitch shifting and its
implementation using Model 585 is covered in Chapter 4.

1-2

Model 585 Time Scaling Processor

Getting Started

This chapter covers connection requirements for Model 585 and the basics of using
the front-panel controls.

2.1 Unpacking and Inspection

Before unpacking Model 585, inspect the outer carton for shipping damage. If the
carton shows damage, inspect Model 585 in the associated areas. The BNC
connectors on the rear panel are covered with protective plastic caps.

The following items are provided with Model 585:

Chapter 2

• Three power cords: one each for US, continental Europe, and the UK. Use the

cord appropriate to your location.

• A bag containing rackmount screws and washers, plus five 75Ω BNC

terminators.

• Warranty information. Fill out the warranty card and return to Dolby

Laboratories. To receive software upgrades, register your product on the
software upgrades page at

2.2 Installing

Installing Model 585 requires:

• Two standard rackspace units.

• Digital I/O. The digital input and output connections on Model 585 may be

unfamiliar to a first-time user of a digital audio device. The Audio
Engineering Society (AES) created a standard electrical interface for digital
audio with a balanced XLR connector and 110

1995. This interface was later expanded to include an unbalanced BNC
connector, 1 Vp–p signal level, and 75

AES3-ID-1995 and SMPTE-276M. Model 585 uses this new standard for
digital audio electrical interface connections.

www.dolby.com/download/softreg.

Ω impedance called AES3-

Ω impedance; it is now known as both

Note: These signals must be properly terminated with a 75Ω impedance at one point

only. We recommend a standard video terminator.

2-1

Model 585 Time Scaling Processor Getting Started

• Cables. We recommend standard 75Ω BNC cables for digital audio signal

connections. To connect to digital equipment with 110

Ω XLR connectors, use

impedance-matching transformers (readily available from Canare, Neutrik,
and other manufacturers).

• Input channel 1/2 must be connected to a valid digital audio signal for proper

operation of the unit.

Model 585 can be used between any two products that carry PCM audio. For specific
installation examples, see Chapter 5, Applications.

2.3 Rear Panel

The main fuse rating is:

T 1A L (1 amp, 250 V, 20 mm, time-lag, low-breaking capacity) for all operating
voltages.

WARNING: Before applying power, check the main fuse, using the procedure
on page viii.

There is no power switch on Model 585. To apply power, connect the power cord to a
live outlet.

2.3.1 Digital Audio Connections

Figure 2-1 shows the digital audio input and output connections.

Digital

1

Ch 1/2Ch 1/2

Ch 3/4Ch 3/4

Digital

Inputs

Inputs

Ch 5/6Ch 5/6

Ch 7/8Ch 7/8

AES RefAES Ref

Ch 1/2Ch 1/2 Ch 3/4Ch 3/4

Digital

3

Digital

Outputs

Outputs

Ch 5/6Ch 5/6

Ch 7/8Ch 7/8

2

Figure 2-1 Connections: Signal In and Out

2-2

Model 585 Time Scaling Processor Getting Started

Figure 2-1 definitions:

1.

Digital Inputs. Model 585 requires PCM audio input at a sample rate of

48 kHz ± 15%. Each input has two connectors; either connector can be used for
the input or as a loop-through for that channel pair. If the loop-through connection
is not being used, it must be fitted with a 75
loop-through signal chain must be terminated with 75

Ω termination. The last device in the

Ω.

Note: Ch 1/2 requires a valid PCM digital audio signal. That input is used to derive

the clocks for all input channels and is the reference clock for scaling.

2. AES Ref. Connect to an AES digital audio reference source. The second connector
can either be used as a loop-through or be terminated, as appropriate.

Note: AES Ref requires a valid AES digital audio signal. That input is used to derive the

clocks for all output channels and so is the reference clock for the digital outputs.

3. Digital Outputs. These connections carry the processed PCM signal.

2.3.2 Serial Connection Ports

Figure 2-2 shows the serial connection ports.

1

Remote RS-232

Remote RS-232

3

GP I/O

Figure 2-2 Connections: Remote RS-232, GP I/O, Metadata In and Out

Figure 2-2 definitions:

1.

Remote RS-232. Connect to this port to update Model 585 software.

2.

Metadata In. (Reserved for future use.) Input port for external metadata. Connect

to a device that delivers Dolby
DP570 Multichannel Audio Tool.

2

Metadata InMetadata In

4

Metadata OutMetadata Out

®

metadata, such as a Dolby E decoder or Model

3.

GP I/O. This port provides a fixed, TTL level-sensitive output indicating the

current status of Model 585.

4.

Metadata Out. (Reserved for future use.) Output port for metadata. Connect to a

downstream Dolby E or Dolby Digital encoder.

2-3