Roland VS-1680 Owner's Manual page 129

Drop Frame and Non-Drop Frame
There are two types of time code used by NTSC
format video cassette recorders, drop, in which
the time code is not continuous, and non-drop,
which features continuous time code. In drop,
which is used for NTSC color video format, the
first two frames of every minute are dropped,
except for those at ten-minute intervals.
fig.08-01(df/ndf.eps)
Non-Drop Frame (29N)
00m59s
01m00s
... 25 26 27 28 29 00 01 02 03 04 05f
Drop Frame (29D)
00m59s 01m00s
... 25 26 27 28 29 02 03 04 05 06 07f
In most video and audio production, since for-
mats with continuous frames are easier to deal
with, non-drop is generally used. In contrast, in
situations such as in broadcast, where the time
code must match actual clock time, drop is used.
Synchronization with the VS-1680 as
the Reference (Master)
When you are having the VS-1680 act to control the
MIDI sequencer, use the following procedure.
1. Connect the VS-1680 and the MIDI sequencer as
shown below.
fig.08-02(vs_mtc->seq.eps)
...
...
2. Press [PLAY (DISPLAY)].
3. Hold down [SHIFT] and press [F5 (SYSTEM)].
The System menu icon appears in the display. If the
System menu icon does not appear, then press [F6
(EXIT)].
4. Press [F4 (MIDI)]. If "MIDI" does not appear in
[F4], first press [PAGE] until "MIDI" is displayed,
then press [F4 (MIDI)].
5. Press [
cursor to "MIDI Thru," and rotate the
TIME/VALUE dial.
MIDI Thru (MIDI Thru Switch)
This selects the function of the MIDI OUT/THRU con-
nector. For now, select "Out."
Out: The connector transmits MIDI messages from
the VS-1680. Select this when you want to trans-
mit metronome Note messages or mixer para-
meter settings (control change messages or
exclusive messages).
Thru: MIDI messages received at the MIDI IN connec-
tor will be retransmitted from the connector
without change.
Chapter 8 Use with MIDI Devices
MIDI IN
MIDI Sequencer
(implements MTC)
], [ ], [ ], and [ ] to move the
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