Why S-Vhs?

Appendix A: Digital Recording Concepts

Digital audio requires lots of numbers to represent an analog version of the same sound. Analog signals may require at least 20kHz frequency response to reproduce audio faithfully. Digital signals for the same 20 kHz audio requires a frequency response of several million Hertz. Due to the way individual numbers are transmitted, digital audio requires a wide bandwidth recording medium 2.

S-VHS recording technology offers more than enough bandwidth to record eight tracks of digital audio. S-VHS tapes are built to higher standards than standard VHS tapes, and can take the tape shuttling required by professional audio applications. S - VHS tape cassettes are also inexpensive compared to reel-to-reel tape, readily available, compact, and easy to transport and store.

2.Bandwidth is a measure of the lowest to highest frequency a signal path can handle.

74	ADAT XT Reference Manual

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Contents

Alesis ADAT-XT Introduction Adat XT Reference Manual Conventions Adat XT Reference Manual Contents Basic Operations Analog Recording Basics Digital Recording Basics Why S-VHS? Index Maintenance/Service Cleaning Obtaining Repair Service Unpacking and Inspection Setting UPAC Power Hookup Chapter Setting Up About Audio Cables Line Conditioners and Protectors Basic Audio Hookup Input Normaling Threaded VS. Unthreaded Word on ADAT’S S-VHS Cassette Tape Mounting on a Shelf or NON-RACK Enclosure Operating EnvironmentThermal Considerations in Rack Mounting Avoiding Electromagnetic Interference ABS 0H 15M 48S POWER-UP,AND Tape InsertionYour First Session ABS n0 F0 Formatting a NEW Tape Formatting a Tape a MustSample Rate Selection Recording While Formatting REL 0H 01M 29S Track Selection and Setting LevelsTo record-enable a track Making a Recording To make a recording Transport ButtonsRecording Record LED turns off, while the Play LED remains lit Playback To engage Review modeTo engage Cue mode Reviewing and Cueing REL 0H 00M 00S LocatingPage Creating a Loop To loop a section of tape To automatically punch in and out Automated RecordingRehearsing Measure twice or more, and cut only once 70 mS Track DelayABS 00 % 00 C Pitch Control Display Brightness To adjust the display brightnessTrack Copy To bounce audio from one track to another Analog Audio Unbalanced Inputs Input Jack CharacteristicsConnections Analog Audio Unbalanced Outputs Analog Audio Balanced Inputs and Outputs Additional grounds Analog Audio Input Mode Input Mode Sync IN/OUT To synchronize multiple XTs and/or ADATs Digital Audio IN/OUT To connect the digital optical network XT Remote FootswitchesRehearse and Auto Record features Versa Formatting Considerations Basic OperationsTape Formatting Complete Format Format Extend Be sure the tape is completely rewound Write Protect Override ABS Pr 0t 0 FFABS Pr 0t 0 n To extend the format on a partially formatted tape Reading the Display Display Icons Basic Operations Locate 01M 29STime Counter & ABS/REL Button Selected Entering Numeric Values Basic EditingEdit Value Button Editing Individual Digits Digital Input Input SelectAnalog Input Track Copy Basic Operations Input Monitor Auto Input MonitorALL Input Monitor Meters Peak Mode ButtonFine Meter Mode Recording a Benchmark T APE Record Enable Setting Levels Rewind /REVIEW Transport ControlsEject Fast Forward /CUE Whether the tape being played is formatted or not RECORD/PUNCH in or OUTStop To start recording Positions as before Sample Rate ClockRecord Crossfade Time To select the sample rate FA dE 2 Displaying Frames VS THS/SECONDSTo set the Crossfade Time About Pitch Changing To set multiple tracks to the same Track Delay value To turn Track Delay on and offTo set the Track Delay amount 10 mS Autolocation Controls Absolute ABS Time VS . Relative TimeLocate To store a Locate Point memory on the fly Setting Locate PointsLocating To edit a Locate Point memory Auto Play Auto LoopingAuto Return Loop Limit Looped Recording Auto RecordTape Length Rehearsal To set the tape length European equivalents and approximate recording timesErroneously selected, to avoid damage to the tape Footswitch Controls Footswitch Controlled PunchingFootswitch Controlled Autolocating Using the XT Remote Operation OverviewSynchronizing Machines Master /SLAVE Interaction Achieving Lock Master Format ENABLED, Format Extend Independent Slave ModeMaster Format ENABLED, Complete Format Formatting Multiple Tapes Master Format Disabled Master Format DISABLED, Format ExtendBefore punching into format record Bouncing Tracks Between Adats Making Digital BackupsRecording Digital Audio Reassigning Channels to Different Tracks To make a backup tape Recording Digital Audio from Other Sources Tape Offset Digital Clock Considerations Setting the Machine Offset ABS 0H 00M 00S Sample Rate VS. Pitch Control Combining XTS and AdatsXT Transport Speed Input Monitoring Here are some possible solutions Polarity DifferencesConnections Multiple ADAT-XT Operation Chapter Multiple ADAT-XT Operation Adat XT Reference Manual Applications Combined MULTITRACK/MASTERING Deck LIVE/LONG-TERM Recording Computer Control Midi Machine Control Virtual Remote ControlLocking to Video Code only Master Midi Systems Virtual Tracking Libraries and Archives Modular Recording Using Track Copy AS a Digital Router Calculating Tape Offset Using the Locates Press Edit VALUE, then press Locate Digital Recording Basics Digital Recording ConceptsAnalog Recording Basics Appendix a WHY S-VHS? RE-INITIALIZING TroubleshootingTROUBLE-SHOOTING Index Appendix B ABS d1 SP E rr Error Rate DisplayAbout Error Rate Readings ABS d1 SP r E9 Adat Head Maintenance Cleaning Tape Maintenance Safe TapeMAINTENANCE/SERVICE Drum Time Display Refer ALL Servicing to Alesis MaintenanceObtaining Repair Service Customers in the USA Appendix B Troubleshooting Error Codes Appendix C Automatic Brake Calibration Procedure Specifications Steps to Take Before Calling for HelpAppendix D Audio Digital Inputs/Outputs Glossary Or Analog-to-Digital Converter Bus DAT Midi MMC Output SMPTE/LTC VHS Vitc Index Index Adat XT Reference Manual

Alesis ADAT-XT manual Why S-Vhs?

Models: ADAT-XT

WHY S-VHS?

ADAT XT Reference Manual