Gebruiksaanwijzing /service van het product 585 van de fabrikant Dolby Laboratories
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Model 585 Time Scaling Processor Issue 2 Part Number 91796.
Model 585 Time Scaling Processor ii Dolby Laboratories, Inc. Corporate Headquarters Dolby Laboratories, Inc. 100 Potrero Avenue San Francisco, CA 94103-4813 Telephone 415-558-0200 Fax 415-863-1373 www.dolby.com European Headquarters Dolby Laboratories, Inc.
Model 585 Time Scaling Processor iii Table of Contents List of Figures ................................................................................................................ v List of Tables ..................................................
Model 585 Time Scaling Processor iv Chapter 6 Principles of Operation ......................................................................... 6-1 6.1 Multichannel Delivery ................................................................... 6-1 6.2 Development of Time Scal ing .
Model 585 Time Scaling Processor v List of Figures Figure 1 Checking th e Main Fu se .................................................................................. viii Figure 2-1 Connections: Signal In and Out ....................................
Model 585 Time Scaling Processor vi Regulatory Notices USA This equipment has been tested and found to comply with the limits for a C lass A digital device, pursuant to Part 15 of the FCC Rules. These limi ts are designed to prov ide reasonable protection against harmful interf erence w hen the equipm ent is operated in a commerci al envir onment.
Model 585 Time Scaling Processor vii IMPORTANT SAFETY NOTICE This unit complies with the safety sta ndard EN60065. The unit shall not be exposed to drippi ng or splashing and no objects fill ed with liquids, such as coffee cups, shall be pl aced on the equip ment.
Model 585 Time Scaling Processor viii Fusing Information WARNING: To reduce the risk of fire, replace fuses only with the same type and rating. The unit uses a univ ersal swit ching power supply that handle s the full rang e of nominal mains voltages betw een 9 0 and 264 VAC and any freque ncy between 50 and 60 Hz.
Model 585 Time Scaling Processor 1-1 Chapter 1 Introduction The Model 585 Time Scaling Processor delive rs true time scali ng and pitch shifting for the studio professional.
Model 585 Time Scaling Processor Introduction 1-2 Pitch shifting, som etim es referred to in othe r documents as pitch sca ling, 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 origina l.
Model 585 Time Scaling Processor 2-1 Chapter 2 Getting Started This chapter covers connection requirement s for Model 585 and the basics of using the front-panel controls. 2.1 Unpacking and Inspection Before unpacking Model 585, inspect the out er carton for shipping damage.
Model 585 Time Scaling Processor Getting Started 2-2 • Cables. We recommend standard 75 Ω BNC cables for digital audio signal connections. To connect to digital equipment with 110 Ω XLR connectors, use impedance-matching transform ers (readily available from Canare, Neutrik, and other manufacturers).
Model 585 Time Scaling Processor Getting Started 2-3 Figure 2-1 definitions: 1. Digital Inputs . Model 585 requires PCM audio input at a sam p le ra te of 48 kHz ± 15%. Each input has two connector s; either connector can be used for the input or as a loop-through for that ch annel pair.
Model 585 Time Scaling Processor Getting Started 2-4 2.3.3 Remote Connection Ports The Remote (9-pin) In and Remote (9-pin) Out ports are reserved for future enhancements. 2.4 Front Panel The front panel is shown with f eature definitions in Figure 2-3.
Model 585 Time Scaling Processor Getting Started 2-5 2.4.1 Reading the Display After powering up, Model 585 displays the main status menu. The factory default is: 5.1 + 2 Sens=5 +0.0 The main status menu shows you: • On the upper line, the program configurati on and the sensitivity level.
Model 585 Time Scaling Processor Getting Started 2-6 Table 2-1 Front-Panel Button Definitions Button Result Shift Selects the alternat e function for a bu tton. To select Status or Bypa ss , hold down Shift and press the button unde r the selection you want.
Model 585 Time Scaling Processor Getting Started 2-7 Caution : Adjusting the pitch shift value or sens itivity level in the main status menu activates that value change immediately; pressing Enter is not required . You do not have the option to press Esc to return to the original setting, so note what that setting is before rotating the knob.
Model 585 Time Scaling Processor Getting Started 2-8 2.6 Setup Menu Options in the setup menu are: • Program Config • Operating Mode • Transport • System Settings Press Enter to view the menu for the option on th e second line of the display. The Transport menu operates the time scaling func tion, and is described in Section 3.
Model 585 Time Scaling Processor Getting Started 2-9 Channel assignments within each program configuration follow standard mapping, as shown in Table 7-1 in Chapter 7, Refere nce Data. The only exception is the low- frequency effects (LFE) channel, which can also be assigned manually, as described in Section 2.
Model 585 Time Scaling Processor Getting Started 2-10 Note: Sensitivity should remain at 5–high for most program material. If the setting must be changed, the change s hould be limited to the length of the specific passage that requires the change, and then returned to 5–high.
Model 585 Time Scaling Processor Getting Started 2-11 2.6.3 System Settings In the System Settings menu, the options are Display Mode and Brightness. Brightness You can use the Brightness menu to adjust the intensity of the display. Changes you make in this menu are activated imm ediately, without pressing Enter .
Virtual Dolb y Techn ologies Tes t DVD Tr ack Lis t iv.
Model 585 Time Scaling Processor 3-1 Chapter 3 Time Scaling Time scaling alters th e durat ion of an audio signal, but leaves the perceived pitch unchanged from the original signal. Mode l 585 offers stand-alone, high-quality multichannel time scalin g of short program segm ents by using the Transport menu.
Model 585 Time Scaling Processor Time Scaling 3-2 3.1.1 Play Enter the Play menu to m anipulate the time scaling of the clip stored in m emory, or to simply play the clip, or any part o f it.
Model 585 Time Scaling Processor Time Scaling 3-3 When a clip is stored in the Model 585 m emory, the Play menu displays the scaled time value of that clip. If you change the sc aling percentage, the length of the scaled clip changes to reflect th at, and the Play menu display, In poin t, and Out point all update accordingly.
Model 585 Time Scaling Processor Time Scaling 3-4 In Point The In point is the point in the audio clip when playback starts. If the transport position is at or before the In point when you press Play, playback begins at the In point. When the transport is at the In point, the display shows a dot before the word In: · In .
Model 585 Time Scaling Processor Time Scaling 3-5 you release Shift , the transport returns to stop m ode at the position in th e clip when you release Shift . Holding Shift makes it particularly easy to move through the clip rapidly, but it also allows you to move slowly at a steady pace, with out having to manually turn the knob.
Model 585 Time Scaling Processor Time Scaling 3-6 all eight channels will be recorded, and the available re cordin g memory is slightly less than three m inutes at 48 kHz. To select which program to record , use the arrow buttons, then press Enter. 3.
Model 585 Time Scaling Processor 4-1 Chapter 4 Pitch Shifting Pitch shifting, som etim es referred to in othe r documents as pitch sca ling, alters the perceived frequency of the audi o signal from that of the original signal without altering the duration of the signal.
Model 585 Time Scaling Processor Pitch Shifting 4-2 2. Use the knob or arrow buttons to scroll through the second line display u ntil you get to Pitch , then press Enter . 3. Use the knob or arrow buttons to adjust the value on the second line. A flashing block displays as you change the value.
Model 585 Time Scaling Processor 5-1 Chapter 5 Applications Model 585 can be used to compensate for pitch changes in many applications, such as: • When changing from 24 to 25 fps (for example, when .
Model 585 Time Scaling Processor Applications 5-2 Source Audio Play Model 585 Model 585 Model 585 Record Audio recorder or straight to broadcast Adjust using T ransport menu, In/Out point 1. 2. 3. Figure 5-1 Stand-Alone Time Scaling For details on how to operate Model 585 to perform stand-alone tim e scaling, see Section 3.
Model 585 Time Scaling Processor Applications 5-3 Figure 5-2 Single-Pass Pitch Shifting In Figure 5-2, the source program video and audio are delivered separately. The playback VTR is used to adjust the sp eed of the program to conform to the requirements for final delivery.
Virtual Dolb y Techn ologies Tes t DVD Tr ack Lis t iv.
Model 585 Time Scaling Processor 6-1 Chapter 6 Principles of Operation Time scaling of audio has been accomp lished previously us ing a variety of approaches. Model 585 differs from previ ous products in two fundam ental ways: • It provides phase-synchr onous multichannel processing in addition to processing of simpler programs.
Model 585 Time Scaling Processor Principles of Operation 6-2 6.2 Development of Time Scaling Time scaling of audio was first achiev ed in the 1950s w ith the invention by Fairbanks, Everitt, and Jaeger 1 of a modified tape record er.
Model 585 Time Scaling Processor Principles of Operation 6-3 Frequency-domain solutions proved useful in certain s ituations, particularly where processing time was not a major factor. Howe ver, they also p roduced characteristic artifacts, and could only be used for a lim ited selection of m aterial.
Model 585 Time Scaling Processor Principles of Operation 6-4 same characteristics (such as common ons et, com mon harmonic properties, or in multichannel audio, common spatial locati on), an d breaks down the complete sound into its component parts before discarding or adding samples.
Model 585 Time Scaling Processor 7-1 Chapter 7 Reference Data 7.1 Channel Mapping Table 7-1 Channel Mapping according to Program Configuration The program number (1–8) identifies the individual programs associated with each channel. So, the entry 2C/2S means “Program 2, Center channe l/Program 2, Surround channel.
Model 585 Time Scaling Processor Reference Data 7-2 Note: In multichannel audio, th e LFE channel is bandwidth-limited, so to properly process the complete program audio, the LFE channel m ust be assigned according to standard channel m apping.
Model 585 Time Scaling Processor Reference Data 7-3 Dynamic Range >110 dB Delay 400 to 480 ms, user-selectable Digital Audio Inputs Four BNC female connectors with loop-through, 75 Ω , unbalanced.
Model 585 Time Scaling Processor Reference Data 7-4 Dimensions and Weight 2-U rack-mount: 88 × 483 × 324 mm (3.5 × 19 × 12.75 inches) Net: 6.5 kg (14.
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