Alesis ADAT-XT manual Combining XTS and Adats, XT Transport Speed, Sample Rate VS. Pitch Control

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Multiple ADAT-XT Operation: Chapter 5

COMBINING XTS AND ADATS

XT TRANSPORT SPEED

The XT’s transport speed has been improved to be four times faster in engaged mode than the original ADAT. Because of this and other unique features, it is recommended that you make the XT the master (ID 1) in your system and your ADAT(s) should be the slave(s). Until you need more than 8 tracks, you may want to avoid inserting tape(s) into the slave unit(s). This is because when locating, the ADATs will move slower than the XT. The result is the XT will locate to a specific tape position, stop and wait for the ADAT(s) to get there before going into play.

SAMPLE RATE VS. PITCH CONTROL

The Clock Select function on the XT is another addition not found on the original ADAT. This function allows you to instantly choose between 48 kHz or 44.1 kHz sampling rates, as well as lets you select a digital clock for applications involving the recording of digital audio from a non-ADAT source). The XT also writes sample rate information when formatting a tape. This way, the XT automatically knows which sample rate a tape was formatted with although either sample rate may be used.

Example: When playing back a tape that was formatted at 48 kHz and the Clock is set to 44.1 kHz, the 44.1K icon will flash, to indicate that you are using 44.1 kHz but it isn’t the original sample rate used when the tape was formatted. The same goes when you playback a tape formatted using 44.1 kHz with the Clock set to 48 kHz; the 48K icon will flash.

It is important to remember that on the XT, the Pitch Controls are supplemental to sample rate selection. With the original ADAT, you had to pitch down a tape in order to playback at a 44.1 kHz sample rate. This is no longer necessary on the XT due to the addition of the Clock Select function.

If you play back a tape that was formatted on an original ADAT, it will not have any sample rate information written on it (since this is a new feature not found in the original ADAT). The XT will automatically select the 48 kHz setting in this case. Therefore, if you had been pitching-down such a tape to play at 44.1 kHz, you must press the [CLOCK SELECT] button to manually change the XT’s Clock to 44.1 kHz.

INPUT MONITORING

The original ADAT was designed so that when you were monitoring a track’s input signal, what you heard was the actual analog input being fed directly to the analog output—the signal did not pass through the A/D and D/A converters. There was an advanced feature whereby, if you held [SET LOCATE] and pressed [ALL INPUT], it would then allow you to monitor the input after the converters, so as to hear exactly how the signal would sound when played back from tape.

The ADAT XT lets you monitor the input signals through the converters at all times. Because of this, there is an extremely minimal delay as the digital audio passes through the converters’ buffers. If you were to listen to both the original signal on your mixer and the tape return of the same signal coming back from the XT, the delay of the signal coming from the XT would cause some phase cancellation when combined with the original signal. Therefore, it is important that you either monitor the original signal or the tape’s input signal on your mixer, but not both.

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 Chapter Setting UPAC Power Hookup Unpacking and InspectionSetting Up Line Conditioners and Protectors About Audio CablesInput Normaling Basic Audio HookupWord on ADAT’S S-VHS Cassette Tape Threaded VS. UnthreadedAvoiding Electromagnetic Interference Operating EnvironmentThermal Considerations in Rack Mounting Mounting on a Shelf or NON-RACK EnclosureABS n0 F0 POWER-UP,AND Tape InsertionYour First Session ABS 0H 15M 48SRecording While Formatting Formatting a Tape a MustSample Rate Selection Formatting a NEW TapeMaking a Recording Track Selection and Setting LevelsTo record-enable a track REL 0H 01M 29SRecord LED turns off, while the Play LED remains lit Transport ButtonsRecording To make a recordingReviewing and Cueing To engage Review modeTo engage Cue mode PlaybackLocating REL 0H 00M 00SPage To loop a section of tape Creating a LoopMeasure twice or more, and cut only once Automated RecordingRehearsing To automatically punch in and outPitch Control Track DelayABS 00 % 00 C 70 mSTo bounce audio from one track to another To adjust the display brightnessTrack Copy Display BrightnessAnalog Audio Unbalanced Outputs Input Jack CharacteristicsConnections Analog Audio Unbalanced InputsAdditional grounds Analog Audio Balanced Inputs and OutputsInput Mode Analog Audio Input ModeTo synchronize multiple XTs and/or ADATs Sync IN/OUTTo connect the digital optical network Digital Audio IN/OUTVersa FootswitchesRehearse and Auto Record features XT RemoteComplete Format Basic OperationsTape Formatting Formatting ConsiderationsBe sure the tape is completely rewound Format ExtendTo extend the format on a partially formatted tape ABS Pr 0t 0 FFABS Pr 0t 0 n Write Protect OverrideReading the Display Display Icons Basic Operations Selected 01M 29STime Counter & ABS/REL Button LocateEditing Individual Digits Basic EditingEdit Value Button Entering Numeric ValuesTrack Copy Input SelectAnalog Input Digital InputBasic Operations Auto Input Monitor Input MonitorALL Input Monitor Recording a Benchmark T APE Peak Mode ButtonFine Meter Mode MetersSetting Levels Record EnableFast Forward /CUE Transport ControlsEject Rewind /REVIEWTo start recording RECORD/PUNCH in or OUTStop Whether the tape being played is formatted or notTo select the sample rate Sample Rate ClockRecord Crossfade Time Positions as beforeDisplaying Frames VS THS/SECONDS FA dE 2To set the Crossfade Time About Pitch Changing 10 mS To turn Track Delay on and offTo set the Track Delay amount To set multiple tracks to the same Track Delay valueAbsolute ABS Time VS . Relative Time Autolocation ControlsLocate To edit a Locate Point memory Setting Locate PointsLocating To store a Locate Point memory on the flyLoop Limit Auto LoopingAuto Return Auto PlayRehearsal Auto RecordTape Length Looped RecordingEuropean equivalents and approximate recording times To set the tape lengthErroneously selected, to avoid damage to the tape Footswitch Controlled Punching Footswitch ControlsFootswitch Controlled Autolocating Using the XT Remote Overview OperationSynchronizing Machines Achieving Lock Master /SLAVE InteractionFormatting Multiple Tapes Independent Slave ModeMaster Format ENABLED, Complete Format Master Format ENABLED, Format ExtendMaster Format DISABLED, Format Extend Master Format DisabledBefore punching into format record Reassigning Channels to Different Tracks Making Digital BackupsRecording Digital Audio Bouncing Tracks Between AdatsRecording Digital Audio from Other Sources To make a backup tapeDigital Clock Considerations Tape OffsetABS 0H 00M 00S Setting the Machine OffsetInput Monitoring Combining XTS and AdatsXT Transport Speed Sample Rate VS. Pitch ControlPolarity Differences Here are some possible solutionsConnections Multiple ADAT-XT Operation Chapter Multiple ADAT-XT Operation Adat XT Reference Manual Combined MULTITRACK/MASTERING Deck ApplicationsLIVE/LONG-TERM Recording Midi Systems Virtual Tracking Midi Machine Control Virtual Remote ControlLocking to Video Code only Master Computer ControlModular Recording Libraries and ArchivesCalculating Tape Offset Using the Locates Using Track Copy AS a Digital RouterPress Edit VALUE, then press Locate Appendix a Digital Recording ConceptsAnalog Recording Basics Digital Recording BasicsWHY S-VHS? Appendix B TroubleshootingTROUBLE-SHOOTING Index RE-INITIALIZINGABS d1 SP r E9 Error Rate DisplayAbout Error Rate Readings ABS d1 SP E rrAdat Head Maintenance Drum Time Display Tape Maintenance Safe TapeMAINTENANCE/SERVICE CleaningCustomers in the USA MaintenanceObtaining Repair Service Refer ALL Servicing to AlesisAppendix B Troubleshooting Appendix C Error CodesAutomatic Brake Calibration Procedure Steps to Take Before Calling for Help SpecificationsAppendix D Audio Digital Inputs/Outputs Or Analog-to-Digital Converter GlossaryDAT BusMMC MidiSMPTE/LTC OutputVitc VHSIndex Index Adat XT Reference Manual