Fostex FD-4 User Manual download pdf (Page 75)

MIDI Synchronization

• If the FD-4 does not chase and lock correctly, check the connecting

cables and settings.

Recording

You can record data on the FD-4 while the FD-4 is chasing

and locking to the sequence software signals.

<Hint>

About the option “Vari” in the “Setting the Slave type” in SETUP

mode:

If the FD-4 chases and locks to only an incoming MTC, Vari Pitch is

applied all the time. Under this condition, if the FD-4 outputs digital

signals to a connected digital device, the device may not be able to

accommodate the FD-4’s speed variation (MTC speed variation of

the master device), resulting in interrupted signal input at the digital

device.

To solve this problem, set the “Setting the Slave type” menu to

“Free.” This will cause the FD-4 to follow its internal clock after it

finishes the chase and lock operation, supplying stable digital sig-

nals to the external digital device.

With the “Free” setting, if the MTC offset between the master and

slave devices exceeds “10 frames,” the slave device interprets this

as out of lock, and tries to chase and lock again (re-chase opera-

tion). During the re-chase operation, the audio output will be muted

and digital signal transmission is also interrupted. If the offset is

within 10 frames, the slave device will continue running while rec-

ognizing the offset.

<Note>

If you set the “Setting the Slave type” menu to “Vari,” the FD-4

applies Vari Pitch all the time to chase MTC.

However, if a digital input track is assigned in the “Setting digital

input tracks” in SETUP mode, the FD-4 will sync to incoming digital

signals (external wordclock sync). This means that the FD-4 will not

apply Vari Pitch during chasing even with the “Vari” setting.

The FD-4 will sync to incoming digital signals after it locks MTC.

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Fostex FD-4 User Manual Page 75