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MOTU Micro Lite [139/166] Smpte synchronization basics
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139
APPENDIX
B SMPTE Synchronization Basics
OVERVIEW
What Is synchronization?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
What is SMPTE? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Two forms of SMPTE: LTC versus VITC. . . . . . . . . . . . . . . . . . . . . . . . 140
What is LTC? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
What is VITC? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
The benefits of VITC over LTC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Should I use LTC or VITC? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Frame rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
What is drop frame? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Why does drop frame exist?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Should I use drop frame? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
How does SMPTE synchronization work? . . . . . . . . . . . . . . . . . . . 144
How does a MOTU synchronizer work?. . . . . . . . . . . . . . . . . . . . . . 144
What is MIDI Time Code? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Locking a MOTU interface to SMPTE . . . . . . . . . . . . . . . . . . . . . . . . 145
WHAT IS SYNCHRONIZATION?
Synchronization is the occurrence of two or more events at
exactly the same point in time. In regard to SMPTE and
MIDI, it is the process of making MIDI devices, such as a
MIDI sequencer, precisely follow one another as they play
back. For example, when a tape deck plays, the sequencer
plays right along with it. When the tape fast forwards to a
new location and begins to play, the sequencer will jump
ahead to precisely the same location and begin playing,
too. Synchronization allows you to freely move about in a
piece of music without ever losing the “lockup” between
the tape and the sequencer.
Without synchronization, devices with independent time
bases, no matter how precisely they keep time, will
inevitably drift apart from one another over time.
WHAT IS SMPTE?
The word SMPTE is an acronym for the Society of Motion
Picture and Television Engineers. In the mid 1970’s, the
society established a timing standard, called SMPTE time
code, that is now an international standard. SMPTE time
code, commonly referred to as just “SMPTE”, was
Содержание
- Mark of the unicorn inc 1
- Midi express xt midi express 128 micro express micro lite 1
- User guide 1
- Adapter 2
- Figure a 2
- Figure b 2
- Grounding lug 2
- Grounding prong 2
- Make sure this is connected to a known ground 2
- Prong plug 2
- Properly grounded 3 prong outlet 2
- Safety precautions and electrical requirements 2
- Two prong receptacle 2
- Copyright notice 3
- General 3
- License 3
- Limited warranty 3
- Limited warranty on hardware 3
- Mark of the unicorn license agreement and limited warranty on software 3
- Update policy 3
- Clockworks for mac os 9 4
- Clockworks for mac os x 4
- Contents 4
- Freemidi and oms 4
- Front panel presets 4
- Glossary 4
- Installing the motu usb midi software 4
- Installing your motu interface 4
- Midi machine control 4
- Packing list and computer requirements 4
- Part i for all users 4
- Part ii for xt micro users 4
- Part iii appendices 4
- Smpte synchronization basics 4
- Synchronization 4
- Troubleshooting and customer support 4
- Using midi software 4
- Chapter 1 7
- Computer requirements 7
- Midi cables not included 7
- Packing list 7
- Packing list and computer requirements 7
- Please register today 7
- Thank you for choosing motu 7
- Familiarity with your computer 8
- Getting started 8
- Midi software compatibility 8
- Visit motu com for software updates 8
- Chapter 2 9
- Connecting the computer 9
- Connecting the power cord 9
- Installing your motu interface 9
- Overview 9
- Connecting midi gear 10
- Here s a suggestion if you have more than a few pieces of gear connected to your motu midi interface jot down which device is connected to each input and output in the worksheet below later on you ll enter this information into your software so you can refer to devices by name 11
- Interface this means that they share the same set of 16 midi channels so try to do this with devices that receive on only one midi channel such as effects modules so their receive channels don t conflict with one another 11
- Midi connections worksheet 11
- Smpte time code sync connections 12
- Connecting a foot switch 14
- Connecting an audio click source 14
- Connecting multiple usb interfaces 15
- What next 16
- Chapter 3 17
- Installing the motu usb midi software 17
- Overview 17
- Software installation for mac os x 17
- Software installation for mac os 9 20
- Creating a freemidi or oms setup 21
- Custom 21
- Daisy chaining midi devices 21
- Freemidi and oms are industry standard midi system extensions for mac os 9 they allow midi software to talk to your motu interface and the devices connected to it they also provide unified midi system configuration for example they supply your midi software with a list of midi devices connected to your motu usb midi interface as a final step in the software installation process you need to run the freemidi or oms setup utility to specify what devices are connected to your motu usb interface for complete details see appendix d freemidi and oms page 151 21
- If you have no choice but to daisy chain you need to configure each device such that it doesn t share any midi channels with other devices in the chain otherwise you ll 21
- In general daisy chain midi devices as shown in figure 3 5 on page 22 should be avoided because it is more complicated to set up than connecting each device directly to your motu interface 21
- Install option for further information 21
- Primary components of the install the information in this table is subject to change check the installer itself under the 21
- Where to go next 23
- All cables port 25
- Chapter 4 25
- Midi inputs and outputs 25
- Using midi software 25
- As for midi data arriving and leaving your computer via the motu usb midi interface driver imagine it coming and going from the motu interface as shown in figure 4 2 all channelizing and filtering is applied before the input data arrives at the computer and after it is sent 26
- From the computer this is a great advantage as it frees up your computer and midi software from having to deal with the mundane and time consuming chore of such processing just configure your motu interface and let it do all the work 26
- The midi data path 26
- About clockworks 29
- Chapter 5 29
- Clockworks for mac os x 29
- Overview 29
- The file menu 31
- The clockworks window 32
- The device list 32
- The routings tab 33
- The presets tab 36
- The mutings tab 37
- The mappings tab 40
- Synchronization and midi machine control 41
- Sync tab settings 44
- The pedal tab 48
- Future updates 51
- Chapter 6 53
- Clockworks for mac os 9 53
- Opening clockworks 53
- Overview 53
- If your motu interface doesn t appear 54
- Clockworks basics 55
- The device list window 55
- Memory meter 59
- Obtaining the rom version 59
- Working with files 60
- Device settings routing 63
- Device settings routing window for the micro express 64
- Device settings routing window for the midi express xt 64
- Naming devices with freemidi or oms if you configured your freemidi or oms setup to accurately reflect the names of the devices connected to your interface you ll see device names as shown below in figure 6 9 these device names are also displayed in other windows throughout clockworks including the channel mapping event muting knobs pedals patch list midi cannon and setups modifiers windows 64
- Channel map 74
- Muting 75
- Sync and midi machine control 78
- Smpte reader 86
- Utilities menu 90
- Assign a midi patch change number to each preset so that it can be called up from a sequencer controller or foot switch 92
- Change the names of the eight user presets 92
- Make modifications to the preset settings 92
- The presets window 92
- The presets window in clockworks as shown in figure 6 40 gives you an overview of information about all the presets it lets you 92
- View an itemized description of each preset 92
- Switching presets using a patch change 94
- Modifying a preset 96
- Working with a foot pedal 97
- Setting up the foot switch output data if you choose foot switch from the pedal type pop up menu the window displays the data for the foot switch as shown in figure 6 44 on page 97 100
- The data sequence list lets you build a series of midi data events here is a summary of what you can do 100
- To do this do this 100
- Chapter 7 107
- Factory versus user presets 107
- Front panel presets 107
- Overview 107
- Selecting a preset on an express xt 107
- Factory presets 108
- Selecting a preset on a micro express 108
- User presets 112
- Accessing sync settings 113
- Chapter 8 113
- If you are new to smpte sync 113
- Overview 113
- Synchronization 113
- Syncing your express interface to smpte 113
- Slaving a sequencer to smpte 116
- Striping smpte 118
- Ltc mode 119
- Mtc mode 122
- Chapter 9 123
- How mmc works 123
- Midi machine control 123
- Overview 123
- Preparing software for mmc 125
- Setting mmc device id s 125
- Setting up other mmc devices 125
- Using software as an mmc controller 126
- Using an mmc control surface 129
- Using other devices as a controller 130
- Address track 133
- Appendix a 133
- Burn in window 133
- Cable routing 133
- Control track 133
- Crosstalk 133
- Default 133
- Drop frame 133
- Glossary 133
- Drop out 134
- Flywheeling 134
- Freemidi 134
- Freewheeling 134
- Genlock 134
- Guard track 134
- Hard record 134
- Horizontal blanking 134
- House sync 134
- Input cable 134
- Insert record 134
- Jam sync 135
- Network 135
- Non drop frame 135
- Output cable 136
- Pal secam 136
- Script 136
- Sequencer 136
- Smpte time code 136
- Smpte to midi converter 136
- Striping 136
- Switcher special effect generator 136
- Synchronizer 137
- Time code generator 137
- Time code window 137
- Universal serial bus 137
- User bits 137
- Vertical blanking 137
- Video field 137
- Video frame 137
- Appendix b 139
- Overview 139
- Smpte synchronization basics 139
- What is smpte 139
- What is synchronization 139
- Two forms of smpte ltc versus vitc 140
- What is ltc 140
- What is vitc 140
- The benefits of vitc over ltc 141
- Frame rates 142
- Should i use ltc or vitc 142
- What is drop frame 142
- Why does drop frame exist 143
- How does a motu synchronizer work 144
- How does smpte synchronization work 144
- Should i use drop frame 144
- What is midi time code 144
- Locking a motu interface to smpte 145
- Appendix c 147
- Common problems and solutions 147
- Troubleshooting and customer support 147
- Troubleshooting 148
- Customer support 149
- Replacing disks 149
- Technical support 149
- Appendix d 151
- Freemidi and oms 151
- Freemidi or oms 151
- Freemidi 152
- Freemidi and oms separately 157
- Oms with freemidi using oms 158
- How the motu usb midi drivers work 159
- Toggling freemidi s use of oms 159
- 120 134 162
- 135 140 162
- 151 156 157 159 163
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