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Drop Frame and Non-drop Frame
There are two types of time codes used by NTSC-format
video-cassette recorders: drop frame, in which time codes are
not continuous, and non-drop frame, in which time codes are
continuous. To achieve compatibility with the NTSC color
video standard, drop frame drops the first two frames of
every minute except the 10th, 20th, 30th, 40th, and 50th
minutes.
fig.16-06e
Non-Drop Frame (29N)
00m59s
01m00s
...
25
26
27
28
29
Drop Frame (29D)
00m59s
01m00s
...
25
26
27
28
29
Because continuous frames are easier to work with, non-drop
frame is used in general video and music production.
Conversely, drop frame is used in television stations and the
like, where time codes must match actual clock times.
Synchronization by means of MTC is not possible when the
Dual Mono mode on the AR-3000R is set to "ON."
MTC synchronization may not be correct when Loop Play for
a phrase is set to "ON." In such cases, use with Loop Play set
to "OFF."
Synchronization with MTC is not possible for phrases for
which MODE2 is set to RDAC-MODE.
Controlling the AR-3000R Using MIDI Signals (MIDI Control)
00 01 02 03 04 05f
...
02 03 04 05 06 07f
...
Connecting External Equipment
You can the AR-3000R as an MTC master or as an MTC slave.
In this connection example, the unit is used as a slave.
fig.16-07e
Video playback device
Video Time code
Video MIDI Sync Interface
MIDI OUT
MTC, MMC signal
MIDI IN
Power Amp.
You can play back audio phrases in sync with video. Fast
forwarding, rewinding, and playback from whatever
position you want is also supported.
Turning the Power On and Off → p. 24
AR-3000R Settings (When the
AR-3000R Is the Slave)
Selection of MIDI Output (MIDI OUT or
MIDI THRU)
This switches the functioning of the MIDI output connector.
OUT: This sends MIDI information from the unit. Select this
when you want to play back MIDI phrases or send Exclusive
(SysEx) messages.
THRU: This takes MIDI information from MIDI IN and sends
it out unchanged. MIDI information from the AR-3000R itself
is not output.
Control signal
MIDI signal
Audio signal
Monitor
113
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