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Chapter 15
Chapter 15 Using External MIDI Devices
This chapter describes the MIDI messages that can be used
by the VS-1824 and the operations that the VS-1824 can
perform using MIDI messages. For more detailed
information about MIDI, refer to “About MIDI” (Appendices
p. 3).
Synchronizing with MIDI
Sequencers
The VS-1824 can be operated in synchronization with a MIDI
sequencer. Refer to the owners’ manual for your sequencer in
conjunction with this manual. There are two main ways to
accomplish synchronization via MIDI. One method is to use
MTC (MIDI Time Code), and the other method is to use
MIDI Clock. MIDI Clock provides two methods within itself;
sync track and tempo map, either of which can be selected.
MIDI Time Code is more precise and should be used for
applications such as syncing to video and syncing the
VS-1824 as a slave to another device. MIDI Clock references
tempo and time signature settings and can be used when
slaving a sequencer or drum machine to the VS-1824.
MTC (See Appendices p. 12)
Items Necessary for
Synchronization
• VS-1824
• Audio equipment to be connected to the MASTER jack,
or stereo headphones
• External MIDI sequencer or computer sequencer
software (such as Emagic® Logic™)
• MIDI Cables
Master and Slave
When synchronizing the VS-1824 with a MIDI sequencer, the
device that sends or transmits MTC or MIDI Clock and acts
as the reference device is referred to as the “master.” The
device that receives the MTC or MIDI Clock signals from the
controlling device is called the “slave.” When using MTC,
you can choose whether to have the MIDI sequencer be the
master that controls the VS-1824, or to have the VS-1824 be
the master that controls the MIDI sequencer. When you use
MIDI Clock, you can synchronize a MIDI sequencer using
the VS-1824 as the master, but it is not possible to
synchronize the VS-1824 as a slave to MIDI Clock.
Using MTC
This section explains how the VS-1824 can be synchronized
with a MIDI sequencer that implements MTC (MIDI Time
Code). When using MTC, you can choose to have the VS-1824
be the master that controls the MIDI sequencer, or to have the
MIDI sequencer be the master that controls the VS-1824.
Frame (See Appendices p. 12),
NTSC Format (See Appendices p. 13),
SECAM format/PAL format (See Appendices p. 13)
MTC Type
The VS-1824 can work with the following types of MTC.
Check the specifications of the MIDI devices that you are
using, and select the appropriate type of MTC in the VS-1824.
30:
30 frames per second non-drop format. This is the VS-
1824 default value, which is used by most sequencers,
audio devices such as analog tape recorders, and for
NTSC format black and white video.
29N: 29.97 frames per second non-drop format. This is
used for NTSC format color video.
29D: 29.97 frames per second drop format. This is used
for NTSC live broadcast color video.
25: 25 frames per second. This is used for SECAM or
PAL format video, film, and audio equipment.
24: 24 frames per second. This is used for film and
some audio devices in the US.
Drop Frame and Non-Drop Frame
There are two types of time code used by NTSC format
video recorders: drop frame, in which the time code is
not continuous, and non-drop frame, which features
continuous time code. In drop, which is used for NTSC
color video formats, the first two frames of every minute
are dropped, except for those at ten-minute intervals.
fig.08-01
Non-drop is generally used for most video and audio
productions, since formats with continuous frames are
easier to deal with. In contrast, in situations such as live
broadcasts, where the time code clock must match actual
clock time, drop frame is used.
00 01 02 03 04 05f2928272625 ......
01m00s
00m59s
02 03 04 05 06 07f2928272625 ......
01m00s00m59s
Non-Drop Frame (29N)
Drop Frame (29D)
