Boss Audio Systems BR-900CD Setting the MTC offset, 159, What are drop and non-drop formats?

Synchronizing with MIDI Devices

25:25 frame per second frame rate. This is used for SECAM or PAL format video, audio equipment, and film (used in Europe and elsewhere).

24:24 frame per second frame rate. This is used for video, audio devices, and film in the US.

6.Press [UTILITY] (or press [EXIT] repeatedly) to return to the Play screen.

*During updating, “Keep power on!” appears in the upper line of the display, while the lower line shows what is being processed.

7.Just as when you synchronize a MIDI sequencer using external MTC, when you use the MCK, you can synchronize the MIDI sequencer using the external MIDI clock.

8.Get the MIDI song data ready for playback.

When the BR-900CD begins playing, the MIDI sequencer will also begin playing in sync with it.

What are drop and non-drop formats?

There are two types of format used by NTSC video cassette recorders, non-drop and drop. With the non- drop format, the frames are continuous. On the other hand, in order to support NTSC color video, the drop format drops the first two frames of every minute excluding minutes 10, 20, 30, 40, and 50.

In most video and audio production, since formats 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.

Setting the MTC offset

The offset sets the time required to align the song playback and MTC timing when synchronizing an external device using MTC from the BR-900CD.

1.Press [UTILITY].

2.Press CURSOR [ ] [ ] to move the cursor to

“SYNC,” and press [ENTER].

fig.05-408ad

3.Press CURSOR [ ] [ ] to select “Offset,” and turn

the TIME/VALUE dial to set the time offset.

fig.05-408d

The offset is set as the difference between the “time to which to align the MTC timing” and the “time to which to align the song timing.” For example, you want to have the external device play back with the MTC timing shown below when the song timing reaches “01h00m00s00,” then set the offset as follows.

Song Timing	MTC for	Offset Setting
	External Device
01h00m00s00	01h30m00s00	00h30m00s00
01h00m00s00	00h30m00s00	23h30m00s00

4.Press [UTILITY] (or press [EXIT] repeatedly) to return to the Play screen.

*During updating, “Keep power on!” appears in the upper line of the display, while the lower line shows what is being processed.

Section 6

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