6
5-Channel Preamplifier Control
The central, 5-layer gain control allows for adjusting preamplification values
between 18 and 72 dB. It controls all channels simultaneously.
Switches: HP and PAD
The PAD switch reduces input level by -25 dBu. The HP switch activates a high pass
filter at 70 Hz, e.g. to eliminate subsonic frequencies.
Outputs
For recordings of the preamplified signals recording devices like a multitrack
recorder can be connected either to the XLR or DB 25 outputs.
LFE Level control
The LFE signal is composed from all channels automatically. Frequency is fixed at
80 Hz, you can simply set the level with the LFE level control (-32 to 0 dB).
PPM Meters
The PPM meters display the levels at the output of each bus. Values range between
-48 dBu und +9 dBu and are displayed in steps of 3 dB.
A short example: How to use the Atmos
One can describe the work with the Atmos very good with the example of an
orchestral recording.
The main mic array is placed in a central position in front of the orchestra.
We choose a position of 1 to 2 meters behind and at least 4 meters above the
conductor.
As a starting point we recommend to adjust all mic heads in their 0° position (if the
mic capsules can be moved) and to select a hypercardioid polar pattern. Moving
the mic capsules allows for fine adjustments, for example smaller L/R angles result
in larger sound stages of small orchestras.
In general, the same rules apply as with standard miking techniques. So every user
can and should develop his own working practice for individual optimization.
Control Elements
