Smpte Rate, Time Code Source, 11.3A Internal | Alesis ALESIS M20

SMPTE, Sync, and Offset, Chapter 11

11.2 SMPTE RATE

SMPTE Rate cycles through six different SMPTE frame rates and types; this affects both SMPTE time code input and M20 SMPTE time code output. It is not possible to receive and transmit different frame rates simultaneously.

∙	24	film
∙	25	European (PAL) video
∙	29.97	NTSC color video
∙	29.97 Drop	NTSC color video drop frame
∙	30	American monochrome video, most audio applications
∙	30 Drop	American monochrome video drop frame

When receiving SMPTE time code, input and output frame rates are set to the incoming frame rate (displayed by the SMPTE frame rate indicator). 29.97 and 30 frames/sec are not identified automatically due to possible source speed variations, and must be set manually.

Frame rates when receiving video are adjusted automatically, as follows:

Clock Source is set	Incoming video	Frame rate…
to…	is…
Video	NTSC	can select 29.97 or 29.97 drop frame
Video	PAL/SECAM	is set to 25 fps

11.3TIME CODE SOURCE

This switch selects either:

∙The time code generated by the M20, with the start time set in the Internal Gen pages (Internal mode)

∙An outside SMPTE source (External mode)

11.3A INTERNAL

Time code generated by the M20 appears at the Time Code Output jack. The internal generator generates SMPTE/EBU time code according to several parameters that are set in Int Gen Edit mode. Code may be generated only when the transport is moving, or when it is stopped. The numbers of the time code being generated may be referenced to tape in several ways, or set independently by the user.

TC Input button: In any case, the internal generator of the M20 will only start issuing code when the white TC Input button, below the TC Track meter and Record Arming button, is turned on. As long as the TC Source is set to Internal, the internal generator (NOT the rear panel Time Code In jack) is considered the “input” source for this button.

When the TC track is not in Input mode and is playing back, the time code output comes from the TC track on the tape, if there is time code printed.

11-2	ALESIS M20 REFERENCE MANUAL 1.06

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Alesis ALESIS M20 owner manual Smpte Rate, Time Code Source, 11.3A Internal, SMPTE, Sync, and Offset, Chapter, 11-2

Contents

Alesis M20 Professional 20-BIT Digital Recorder Alesis M20 Reference Manual Table of Contents Track Record Enabling and Monitoring Table of ContentsTape Formatting Digital/Analog Input Selection and Routing Midi Functions AutolocationVarispeed SMPTE, Sync, and Offset Functions Utility Menu LRC Remote Control Tutorials and Applications M20 Smpte Synchronization Overview Time Code Tutorial Maintenance and TroubleshootingUsing The M20 Data Section Of Tape M20 Hidden Functions Table of Contents Important Safety Instructions and Compliance Safety Symbols Used in this ProductPlease Follow These Precautions When Using this Product Viii Symboles Utilisés Dans CE Produit Safety NoticesInstructions DE Sécurité Importantes Safety Notices ICES-003 Issue CE Declaration of Conformity OVERVIEW, SETUP, and Basics ChapterM20 Highlights AC Power Hookup Overview, Setup and Basics, ChapterUnpacking and Inspection Line Conditioners and Protectors About Audio Cables USE the Right Tape BackupBasic Audio Hookup Preparing the Tape Prior to USE Overview, Setup and Basics Operating EnvironmentAvoid Electromagnetic Interference M20 Front Panel Control and Connector Basics About the Front Panel Control and Connector Basics, Chapter M20 Rear Panel with optional EC-1 AES/EBU Card About the Rear Panel 2G Video in and Thru 2L Power2I Midi in and OUT 2H Adat Sync in and OUT Editing M20 Operating Parameters Keypad To customize the default set of names 1F ENTER/NAMEEditing M20 Parameters, Chapter 1I Entering Parameter Values 1G Selecting Pages1H Selecting page Parameters Editing M20 Parameters Edit Button Editing Conventions Tape Formatting Sample Rate Selection Formatting Tape, Chapter Word Length Selection 1A PULL-UP and PULL-DOWN Sample Rate SelectionFormatting Tape Format a NEW Tape Record Tracks While Formatting Certify Tape Format Extend a PARTIALLY-FORMATTED TapeEND Formatting Reformatting Caution Lock OUT Formatting Safe Mode Bulk ErasingRecording a Benchmark Tape Track Record Enabling and Monitoring Track Basics Record Enable Track Input EnablesAuto Input Switch Track Record Enabling and Monitoring, Chapter Safety Mode ALL Safe Monitor Inputs ALL Input Track Record Enabling and Monitoring, Chapter DIGITAL/ANALOG Input Selection and Routing Digital SourceInput Select Input Signal Routing Analog and Digital Track Output SelectionInput Selection and Routing, Chapter 4A Analog Input Routing Input Selection and Routing If digital source = I/O Card AES/EBU 4B Digital Input RoutingIf digital source = Adat Optical If digital source = Track Copy 4C RECORD-ENABLING the Destination Tracks AUX Routing Input and Output Meter Mode Selection Metering1A Clearing Peaks Meter Setup Metering, Chapter Transport Controls and Basic Recording About the Tape Counter 3A Play Button and Sync Status 4A JOG ModeJOG/SHUTTLE Wheel and Search Transport Controls and Basic Recording, Chapter 4B Shuttle Mode 4C Search Button 4D Search Master Other Transport Buttons You press… If tape is If tape is moving You see… Stopped Record 6A Punching Into Record6B Punching OUT of Record How to Override Write-Protection Rehearse Mode6D Recording with a Footswitch 6C Record WRITE-PROTECTION 8A Setting Auto Record Punch Points Auto Record 8B Enable Auto Record 8C SET Auto Punch Points on the FLY Transport Controls and Basic Recording, Chapter 1A SET Locate AutolocationENTERING, SELECTING, and Editing Location Points 1B Copy Tape Location Autolocation, Chapter To select and edit location points Deferred Play and Record PLAY-AFTER-LOCATE Auto PlayLoop Between Start and END Locate Points Auto Return 4A Setting Loop Start and END Points SET PRE-ROLL SET POST-ROLL FOOTSWITCH-CONTROLLED Location Varispeed 10-1 Varispeed, Chapter 10-2 SMPTE, SYNC, and Offset Functions Clock Source11-1 11.3A Internal Smpte RateTime Code Source SMPTE, Sync, and Offset, Chapter Chase Reference SMPTE, Sync and Offset11-3 11.6A SET Smpte Offset Value Smpte ChaseReference Counter 11-4 11.6D Park Ahead 11.6B SET Smpte Chase Mode11.6C SET Flywheel Duration 11-5 11.7A Generator Mode Internal Generator11-6 11.7B Time Code Start Reference 11.7C ABS/START Offset11-7 Tape Offset 11-8 Hmsfsf 11-9 Track Delay 11-10 To change delay for several tracks at once 11-11 SMPTE, Sync, and Offset, Chapter 11-12 MMC Output Midi FunctionsMidi Device MTC Follow GEN Load SOFTWARE? Receive Sysex DUMP?Send SOFTWARE? Approximately 12 minutes 12-3 Midi Functions, Chapter 12-4 Online Source Utility MenuDigital OUT 13.2A Online Button ONE-BUTTON Record 13.2B Independent Slave ModeOnline Control Input Monitor Time Code Output Level Unthread TimeoutCrossfade Time REWIND/FAST Forward TC Output Mute Until Lock Search EnableLocate Before Play Dynamic Punch Load Data from TAPE? 13-5 Front Panel Software Version Software Version13-6 LRC Remote Control 14-1 LRC Remote Control, Chapter 14-2 Overview Tutorials and ApplicationsTutorial 1 Multiple M20 Operation Synchronizing Machines Achieving Lock Independent Slave ModeMASTER/SLAVE Interaction Tutorials and Applications, Chapter Formatting Multiple Tapes Master Format ENABLED, Complete FormatMaster Format ENABLED, Format Extend 15-3 Master Format Disabled Master Format DISABLED, Format Extend15-4 Tutorial 2 Making Digital Backups 15-5 Dealing with Damaged Tape Making a 16-BIT Copy from a 20-BIT Master15-6 Tutorial 3 Recording Digital Audio from Other Sources Digital Clock Considerations15-7 Sample Rate VS. Pitch Control Tutorial 4 Combining M20S and AdatsM20 Transport Speed Input Monitoring Polarity Differences 15-9 Tutorial 5 Setting UP Inputs 15-10 Tutorial 6 Updating M20 Software 15-11 Tutorial 7 Using the M20 with Unbalanced Inputs and Outputs 15-12 Chapter Synchronization OverviewSynchronization Basics Master or SLAVE? 16.2B Genlocked Time Code ONE Clock Principle16.2A House Sync Smpte Synchronization Overview, Chapter 16.3B Reference Clock Reference Counters VS. Clock Sources16.3A Location Reference Smpte Synchronization Overview 16-4 Offsets in the M20 16.3A Smpte Chase Offset16-5 16.3B Internal Generator ABS Offset 16.3C Tape Offset16-6 16.4B AUTO-DETECTION of Smpte Rates Smpte Time Code Rates and Types16.4A Drop Frame 16-7 16.4D MTC Midi Time Code 16.4C Vitc Vertical Interval Time Code16-8 Press Edit to leave edit mode. The blue light will turn off Time Code TutorialGenerating Time Code Onto a VCR 17-1 Press INT GEN or TC Input to stop the time code generator Synchronizing Without a T/C TrackTime Code Tutorial, Chapter 17-2 Leave Edit mode, turn on INT GEN, and arm the TC track Recording a Time Code Track17.3A Recording Smpte from ABS Time 17-3 Press Play and Record Maintenance Troubleshooting Adat Head Cleaning18-5 18.1A Head Cleaning Cassettes Optional 18.1B Manual Head and Tape Path CleaningMaintenance and Troubleshooting, Chapter Adat Head Life 18.2A Head Alignment18-7 18.3B Care of Adat Tapes Tape Maintenance Safe Tape18.3A Tape Wear 18-8 18.4B Maintenance MAINTENANCE/SERVICE18.4A Exterior Cleaning 18.4C Refer ALL Servicing to Alesis 18.4D Obtaining Repair Service Customers in the USA18-10 Miscellaneous Button Combinations POWER-ON Button CombinationsM20 Hidden Functions Appendix Appendix 1, M20 Hidden Functions A1-2 Advanced Functions M20 Software VersionMA-3 Page General Data Section Convention on the M20 Using the M20 Data Section of TapeBRC ⇔ M20 Song Start / Smpte Start Offset M20 Locate Points and Smpte Offsets Appendix 2, Using The M20 Data Section Of Tape BRC ⇔ M20 Parameter MAPA2-2 Appendix 2, Using The M20 Data Section Tape A2-3 Appendix 2, Using The M20 Data Section Of Tape A2-4 M20 Transport System Error Messages A3-1 Appendix 3, M20 Transport & System Error Messages A3-2 Capstan State Transition Errors A3-3 Deck State Transition Errors A3-4 Other Errors Messages A3-5 Appendix 3, M20 Transport & System Error Messages A3-6 RS-422 Track ARM ON/OFF M20 Major Feature Update VersionRS-422 Sony 9-PINSLAVE Operation RS-422 Mapping 1-2, ODDEVN, Local M20 master and two slaves ID 1 à ID 2 à ID Storing Locate Points When ID 1 is OfflineID 1 Offline with the Cadi Remote Cadi with M20 master and two slaves Cadi à ID 1 à ID 2 à ID Special notes when operating a Cadi with ID 1 offline Tape TC Detection in Fast Wind Modes Fixed Mode Time Code Generation TC Start REF Tape TC in the Tape CounterMA-4 Smpte Chase with the Stop Button Tape TC Updating When in Input ModeCard AS the Digital Source VARI-SPEED and PULL-UP/DOWN Cadi Display Changes Midi ThruNEW Utility page Order Cassette AUTO-INJECT NEW RS-422 Device ID