Alesis ADAT-XT manual Sample Rate Clock, Record Crossfade Time, Positions as before

Page 48

Chapter 4: Basic Operations

[STOP] to thread the tape ([STOP] LED is lit). Entering play or record more will also thread the tape, if it was previously unthreaded.

•Punch out . When recording, pressing [STOP] will exit record mode and stop the transport.

SAMPLE RATE (CLOCK)

The XT records digital audio in a similar manner as a DAT recorder or digital sampler. You may select between two sample rates when using the XT’s internal clock: 48 kHz and 44.1 kHz. Select the sample rate to match the balance of the recording system you are connected to.

 

The currently selected sample rate is indicated by the CLOCK group of icons in the

 

display. When the INT and 44.1K icons are lit, the XT is set to an internal 44.1 kHz

 

clock. When the INT and 48K icons are lit, the internal 48 kHz clock setting is in use.

 

The default setting is internal 48 kHz (INT 48K).

J

Changing the clock from 48kHz to 44.1 kHz, or vice-versa, will change the reference

point upon which the Pitch controls are based. This will also cause the TIME counter

 

to change; the Locate Points (see pages 48 & 49) will be referenced to different time

 

positions (when viewed), although they still correspond to the same physical tape

positions as before.

To select the sample rate:

¿Press the [CLOCK SELECT] button.

Each time the [CLOCK SELECT] button is pressed, the right side of the display will cycle through the following settings: INT 48K , INT 44.1K, DIG 48K, and DIG 44.1K.

For more info on DIG and EXT clock settings, see chapter 5.

It is recommended that you select the sample rate you want to use before you format a tape. During the formatting process, the sample rate information is written onto the tape. This information allows the XT to know what sample rate the tape was originally formatted at. When inserting a tape that was formatted at 48 kHz, the XT reads the timecode from tape for a moment and automatically selects the 48 kHz clock setting. If the clock is then manually changed 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 play a tape formatted using 44.1 kHz with the clock set to 48 kHz; the 48K icon will flash.

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 on the ADAT). In this case, the XT will assume the tape was formatted at 48 kHz. Therefore, if you had been pitching-down such a tape on an ADAT to play at 44.1 kHz, you must press the [CLOCK SELECT] button to manually change the clock to 44.1 kHz.

RECORD CROSSFADE TIME

Crossfading is the process of fading out the original audio on tape while fading in the new audio when punching in (or vice-versa when punching out). Whenever recording begins or ends, the XT provides a smooth transition between the audio on tape and the audio being recorded. This prevents gaps and/or noises when punching in and out of record.

The Record Crossfade Time setting determines how long it takes for the audio to completely transition from the previous audio to the current audio when recording. The default is 11 milliseconds but can be increased to 43 ms. The faster crossfade time allows you to punch in and out quicker, and is best used when the audio on tape

44

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 Setting UP AC Power HookupUnpacking and Inspection ChapterSetting Up About Audio Cables Line Conditioners and ProtectorsBasic Audio Hookup Input NormalingThreaded VS. Unthreaded Word on ADAT’S S-VHS Cassette TapeOperating Environment Thermal Considerations in Rack MountingMounting on a Shelf or NON-RACK Enclosure Avoiding Electromagnetic InterferencePOWER-UP,AND Tape Insertion Your First SessionABS 0H 15M 48S ABS n0 F0Formatting a Tape a Must Sample Rate SelectionFormatting a NEW Tape Recording While FormattingTrack Selection and Setting Levels To record-enable a trackREL 0H 01M 29S Making a RecordingTransport Buttons RecordingTo make a recording Record LED turns off, while the Play LED remains litTo engage Review mode To engage Cue modePlayback Reviewing and CueingREL 0H 00M 00S LocatingPage Creating a Loop To loop a section of tapeAutomated Recording RehearsingTo automatically punch in and out Measure twice or more, and cut only onceTrack Delay ABS 00 % 00 C70 mS Pitch ControlTo adjust the display brightness Track CopyDisplay Brightness To bounce audio from one track to anotherInput Jack Characteristics ConnectionsAnalog Audio Unbalanced Inputs Analog Audio Unbalanced OutputsAnalog Audio Balanced Inputs and Outputs Additional groundsAnalog Audio Input Mode Input ModeSync IN/OUT To synchronize multiple XTs and/or ADATsDigital Audio IN/OUT To connect the digital optical networkFootswitches Rehearse and Auto Record featuresXT Remote VersaBasic Operations Tape FormattingFormatting Considerations Complete FormatFormat Extend Be sure the tape is completely rewoundABS Pr 0t 0 FF ABS Pr 0t 0 nWrite Protect Override To extend the format on a partially formatted tapeReading the Display Display Icons Basic Operations 01M 29S Time Counter & ABS/REL ButtonLocate SelectedBasic Editing Edit Value ButtonEntering Numeric Values Editing Individual DigitsInput Select Analog InputDigital Input Track CopyBasic Operations Input Monitor Auto Input MonitorALL Input Monitor Peak Mode Button Fine Meter ModeMeters Recording a Benchmark T APERecord Enable Setting LevelsTransport Controls EjectRewind /REVIEW Fast Forward /CUERECORD/PUNCH in or OUT StopWhether the tape being played is formatted or not To start recordingSample Rate Clock Record Crossfade TimePositions as before To select the sample rateFA dE 2 Displaying Frames VS THS/SECONDSTo set the Crossfade Time About Pitch Changing To turn Track Delay on and off To set the Track Delay amountTo set multiple tracks to the same Track Delay value 10 mSAutolocation Controls Absolute ABS Time VS . Relative TimeLocate Setting Locate Points LocatingTo store a Locate Point memory on the fly To edit a Locate Point memoryAuto Looping Auto ReturnAuto Play Loop LimitAuto Record Tape LengthLooped Recording RehearsalTo 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 LockIndependent Slave Mode Master Format ENABLED, Complete FormatMaster Format ENABLED, Format Extend Formatting Multiple TapesMaster Format Disabled Master Format DISABLED, Format ExtendBefore punching into format record Making Digital Backups Recording Digital AudioBouncing Tracks Between Adats Reassigning Channels to Different TracksTo make a backup tape Recording Digital Audio from Other SourcesTape Offset Digital Clock ConsiderationsSetting the Machine Offset ABS 0H 00M 00SCombining XTS and Adats XT Transport SpeedSample Rate VS. Pitch Control Input MonitoringHere are some possible solutions Polarity DifferencesConnections Multiple ADAT-XT Operation Chapter Multiple ADAT-XT Operation Adat XT Reference Manual Applications Combined MULTITRACK/MASTERING DeckLIVE/LONG-TERM Recording Midi Machine Control Virtual Remote Control Locking to Video Code only MasterComputer Control Midi Systems Virtual TrackingLibraries and Archives Modular RecordingUsing Track Copy AS a Digital Router Calculating Tape Offset Using the LocatesPress Edit VALUE, then press Locate Digital Recording Concepts Analog Recording BasicsDigital Recording Basics Appendix aWHY S-VHS? Troubleshooting TROUBLE-SHOOTING IndexRE-INITIALIZING Appendix BError Rate Display About Error Rate ReadingsABS d1 SP E rr ABS d1 SP r E9Adat Head Maintenance Tape Maintenance Safe Tape MAINTENANCE/SERVICECleaning Drum Time DisplayMaintenance Obtaining Repair ServiceRefer ALL Servicing to Alesis Customers in the USAAppendix B Troubleshooting Error Codes Appendix CAutomatic Brake Calibration Procedure Specifications Steps to Take Before Calling for HelpAppendix D Audio Digital Inputs/Outputs Glossary Or Analog-to-Digital ConverterBus DATMidi MMCOutput SMPTE/LTCVHS VitcIndex Index Adat XT Reference Manual
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