Chapter 9 Use with MIDI Devices

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.

00m59s

 

 

 

 

 

 

 

 

 

01m00s

 

 

 

 

 

 

 

 

 

...

25

26

27

28

29

00

01

02

03

04

05f ...

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drop Frame (29D)

00m59s01m00s

... 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-880EX

as the Reference (Master)

When you are having the VS-880EX act to control the MIDI sequencer, use the following procedure.

1.Connect the VS-880EX and the MIDI sequencer as shown below.

MIDI IN

Frame (Appendices p. 123)

NTSC Format (Appendices p. 124)

SECAM Format/PAL Format (Appendices p. 124)

MIDI Sequencer

(implements MTC)

2.Press [SYSTEM] several times until “SYS MIDI PRM ?” appears in the display.

3.Press [YES].

4.Press PARAMETER [ ] several times until “SYS MID: MIDIThr=” appears in the display.

5.Rotate the TIME/VALUE dial.

Chapter 9

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-880EX. Select this when you want to transmit metronome Note messages or mixer parameter settings (control change messages or exclusive messages).

Thru: MIDI messages received at the MIDI IN con- nector will be retransmitted from the connector without change.

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Roland owner manual Use with Midi Devices, Synchronization with the VS-880EX As the Reference Master, 117