Sound Devices 788T - Manual (Page 37)

The Input Activity LEDs illuminate yellow when an input is being limited at either stage. When a
fader accessory is connected, the 788T will indicate pre-fade limiting and the fader accessory will
indicate post-fade limiting. The Input Limiters are active for both mic- and line-level inputs.
Enable or disable the Input Limiters using the soft Lim (HDD) key while in the Input Settings Win-
dow. This enables/disables both the pre- and post-fade limiters. The 788T offers several adjustments
for its peak limiter to tailor the sound to the user’s desire: Threshold; Knee; Ratio; and Recovery.
The Limiter Threshold adjusts the maximum peak level at which the limiter will engage. Sounds
louder than this threshold are attenuated. This threshold is adjustable in the Setup Menu option
INPUT: LIMITER THRESHOLD
from -12 to -2 dBFS in .1 dBFS increments.
The Limiter Recovery adjusts how slowly the limiter brings its gain back up after a peak is lim-
ited. A shorter recovery follows the envelope of speech better than a longer recovery, but at
the expense of low-frequency distortion. Recovery time is adjustable in the Setup Menu op-
tion INPUT: LIMITER RECOVERY from 50 msec to 2000 msec in 10 msec increments.
Setup Menu option INPUT: LIMITER KNEE allows the user to control the ratio at which the signal is
limited and whether the limiter has a Hard- or Soft-Knee. The limiter ratio is either infi nite: 1 or 20:1.
The hard knee setting leaves all program material below the threshold completely unaffected and at-
tenuates only those peaks above the threshold. The soft knee setting attenuates the program material
slightly before the threshold (about 6 dB) for a more gradual tape-like sound.
Inputs can have their limiters linked or grouped according to the Input Linking settings. This is ideal
for working with stereo or surround sources.
See Input Linking.
Input Limiters are disabled when set to record at high sampling rates (48048 +).
Input Polarity
Input Polarity inversion (sometimes referred as phase reverse) can be applied to both analog or digi-
tal inputs. This can be used to rectify incorrectly wired balanced cables, to prevent signal cancellation
when a source is dual-miked from opposite directions, or reverse left/right with MS microphones.
Select between Normal and Inverse polarities using the LCD Backlight key. When the Input Polarity
symbol is highlighted, the polarity is inversed.
Input Mute
To mute an input, press the soft Mute (Fast Forward) key. When an input is muted, the Mute dis-
play will fl ash and the respective Input Activity Ring LED illuminates solid red. Muting an input
effectively turns the Input Gain Pot to negative infi nity without having to touch the Input Gain Pot.
Muting an Input does not change the Input to Track Routing. Muted Inputs assigned to tracks that
are record enabled will record silence. This is useful when an input is not needed temporarily but the
user wishes to maintain all settings, levels, and track counts.
Input to Track Routing
The Input to Track Routing allows the user to quickly view and edit the input-to-track routing for the
selected input. The highlighted selections indicate the tracks that the input is currently routed to. In
order to record, tracks must be armed in the Track Setup Menu.
For more details view the Input to Track
Routing Section.
Inputs and Outputs
3
788T/788T-SSD User Guide and Technical Information
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