User guide

USING CLOCKWORKS FOR MAC OS X WITH THE MIDI TIMEPIECE AV 10
When the Wait for de v ice on play option is unchecked, the MIDI
Timepiece AV may, depending on the situation, begin generating
or converting time code while the ADAT is still cueing to catch up
to the current playback location. The device will begin playing as
soon as it catches up.
Tur ni n g th is opt ion on for all ADATs will ensure that they all begin
playing at the same time. But the trade-off is that you will have to
wait for all of them to cue before playback begins. Here are some
other reasons why you might want to turn this option off for a
device:
■ The device is particularly slow.
■ Yo u j u s t d o n’t want to have to constantly wait for a particular
device to catch up.
■ Yo u h av e s e veral random-access systems that can cue instantly,
along with one device that has a tape transport, and you don’t
want to wait for the one tape transport device.
Do not send timecode until device is locked
This option, when checked, causes the MIDI Timepiece AV to
mute time code until all ADATs are locked and rolling. This is
useful if there are additional devices slaved to the MIDI
Timepiece AV via time code, and you want them to start together
with the ADATs.
THE SYNC TAB
The Sync tab has the following status indicators and options:
Figure 14: The Sync tab.
Status section
The status section provides detailed information about what state
the MIDI Timepiece AV is in as a synchronizer. The following
sections provide a brief explanation of each term.
Figure 15: The Status section.
Output phase lock
When this status indicator is illuminated, it means that time code
generated by the MIDI Timepiece AV (MTC and LTC) is in sync
with the current time base.
Input frame phase lock
When this status indicator is illuminated, it means that the MIDI
Timepiece AV has successfully achieved lockup with incoming
LT C / M T C full frame messages.
Input quarter frame phase lock
When this status indicator is illuminated, it means that the MIDI
Timepiece AV has successfully achieved lockup with incoming
LT C / M T C quarter frame messages.
External time code detect
When this status indicator is illuminated, it means that the MIDI
Timepiece AV has successfully detected external time code (MTC,
LT C ) .
Framelocked
This status indicator means that the MIDI Timepiece AV is
successfully locked to an external time base and that it is also
successfully generating or converting SMPTE time code.
Wor d c lo c k st a b l e
When this status indicator is illuminated, it means that the MIDI
Timepiece AV has successfully achieved a stable time base rate
from its internal time base or by determining the external time
base rate.
Frame lock
To u n de rs t a nd t he Fr a m e lock option, you first need to know that
the MIDI Timepiece AV continuously monitors incoming time
code to detect any possible discontinuity in the frame times as
they advance. If the MIDI Timepiece AV detects more than five
frames in a row that are not continuous with respect to previous
frames received, then it does one of two things, depending on
whether the Frame lock option is turned on (checked) or off
(unchecked).