Alesis AI-2, Справочное руководство

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AI2014A
TIME CODE
MIDI
TIME CODE
LONGITUDINAL
TIME CODE
REFERENCE
W/C IN RDR IN VID IN
CONTROL
LYNX-2 / MICRO LYNX
MIDI
OUT IN
BRC
MIDI
OUT IN THRU GEN OUT
W/C OUT SYNC OUT
ADAT
POWER CONFIG
EDITOR S/N
ALESIS AI-2
MANUFACTURED BY
TimeLine Vista, Inc.
MADE IN USA
ALESIS CORPORATION, LOS ANGELES
CAUTION: TO PREVENT ELECTRICAL SHOCK DO NOT REMOVE COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE
HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPTERATIONS.
5.9 MIDI TIME CODE (MTC)
The AI-2 generates MIDI Time Code which is available at the MIDI
OUT connector in the control section of the AI-2 rear panel.
Operation of the MIDI time code generator follows the LTC genera-
tor mode, if the LTC generator is set to generate code in still, play
and wind then the MTC generator will do the same.
The MTC output always matches the time code at the GEN OUT
connector, which as described above, generates a virtual or relative
position for the ADAT at any given time. The MTC generator can
be turned on or off in the MIDI setup menu. It should be noted, that
the LTC must be on for the AI-2 to generate MTC.
When the MIDI connectors in the control section are being used for
MIDI machine control, or for controlling the BRC, the precise timing
of the MIDI Time Code output cannot be guaranteed, however
every effort has been made to maintain the integrity of the MTC
transmission.
5.10 TIME CODE AND SAMPLE CLOCKS
Any device which combines both time code and digital audio
sample clocks, must maintain a very accurate interrelationship
between the time code rate and the sample clock rate for the
system to synchronize. The AI-2 generates both time code and
digital audio sample clocks with an extremely precise and
consistent relationship.
As an example, if time code is running at 30 frames-per-second and
the sample clock rate is 48,000 samples-per-second, then there
must be exactly 1600 samples for each frame of time code.
The AI-2 is capable of generating and maintaining all possible
frame rate, sample rate combinations locked to either internal or
external speed references.