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User Guide
82
Setting the Frame Rate
By default, the 688’s frame rate for the timecode generator is set to 30nd.
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The frame rate value is stored in the Frame Rate
fi
eld of metadata.
When using an external timecode mode, ensure the mixer’s frame rate is equal
to (or cross-jam compatible to) the external frame rate.
To set frame rate for the timecode generator:
1. Press the MENU button.
2. Turn and press the Headphone encoder to select TIMECODE/SYNC > Frame
Rate. Options include: 23.98, 24, 25, 29.97nd, 29.97df, 30nd and 30df.
Setting Timecode Hold Off
Some devices that send Rec-Run timecode will have a tendency to occasionally
send short bursts of running or invalid timecode. When using these devices as
an external timecode to trigger recording, this behavior can result in uninten-
tional recordings or invalid timecode stamps on the mixer. To prevent this, the
688 features a Timecode Hold Off function.
This feature only applies when in Ext-TC Auto-Rec and Ext-TC Auto-Rec/Cont
timecode modes.
When using these external timecode auto-record modes, the 688 will delay the
start of recording for a speci
fi
ed “hold” time. Running timecode that lasts for
less than the Hold Off value will not trigger a recording on the 688.
To set up Timecode Hold Off:
1. Press the MENU button.
2. Turn and press the Headphone encoder to select TIMECODE/SYNC > Hold
Off.
3. Specify the hold time in 0.1 second intervals. Options include: 0.0 s - 8.0 s.
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If a pre-roll time is set, it will be applied. Pre-roll will only capture audio from the
initial detection of a timecode signal. If no pre-roll is selected, the
fi
le will begin af-
ter the Hold Off period expires. It is best practice to set pre-roll to a value greater
than the speci
fi
ed Hold Off value. This ensures that audio is captured from the mo-
ment a timecode signal is detected and that unintentional
fi
les triggered by short
bursts of timecode are not generated.