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744T User Guide and Technical Information
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firmware v. 1.04 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
combination the user gets the best of both VU and Peak metering by seeing both the “loudness” of
the signal and the peaks at the same time. Peak/VU is the factory default.
Peak Hold/VU
Similar to VU/Peak mode, this mode holds the peak level indication for several seconds before
releasing. Peak Hold indicators are useful for metering in applications when an overload condition is
unacceptable.
Peak LEDs
input signal present LEDs
input peak LEDs
headphone peak LED
In addition to the main LED output meter, peak LEDs show input peaks, track peaks, and head-
phone peaks.
Input Peak
The 744T has a peak LED associated with each input. These LEDs illuminate when input signals
reach the user-selected signal threshold.
Track Peak
The 0 dBFS LED on each track can also function as a track peak indicator. The user can select a signal
threshold above which the 0 dB LED will fl ash.
Headphone Peak
Like the channel peak LEDs, the headphone circuit has an indicator for peak overload. This LED is
useful, since headphones can often overload before the recorder overloads. Monitoring without a
visual indication of headphone clipping may mislead the operator into thinking that the output or
return tracks are distorting.
Tone Oscillator
The tone oscillator level and frequency are user selectable. Reference level is adjustable over a range
of −40 to 0 dBFS. Reference tone frequency is adjustable from 100 to 10,000 Hz. Standard tone levels
vary according to the practices and needs of production and post-production, but are generally in
the -20 to −12 dBFS range. Select a range that is appropriate for your project one that will allow suf-
fi cient headroom.
The tone oscillator is activated by pressing the front panel key. Tone is sent to all active tracks
while the key is depressed.
LCD Contrast & Backlight, LED Brightness
LCD
LCD contrast is setup menu controlled. From the factory the contrast is set to 20%, suitable for most
viewing conditions. Contrast can be increased or decreased.
The front panel key toggles the LCD and key backlight. Backlighting is suitable for low- and
no-light recording.