Level Faders; Peak Meters - Digigram VX442 Manuel Utilisateur

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LEVEL FADERS

Each volume fader may be controlled by dragging its fader 'handle' vertically
with the mouse, or by clicking on the 'handle' to make it active and then
adjusting it with the up/down cursor keys of your computer keyboard. As the
mixer has no gain, these faders only attenuate the signal levels. The highest
setting is 0 dB, or 'Unity Gain'. The default fader setting is the quietest setting,
–144dB, which mutes the audio. A pair of level faders may be "ganged" so that
both channels may be adjusted together as a stereo pair.
Note: This is not a genuine mixer, it is a Monitor Mixer. It does not change the level
of the signal you are sending to your hard drive - only your monitoring levels.
If you are sending a hot signal to your hard drive and you're getting clipping
(sharp distortion), you cannot change that by pulling the faders on this mixer
down. You must adjust the signal at the source (your keyboard, preamp, etc.).
Also, at the top of each fader and meter is a fader level "fine adjustment"
control. Clicking on the small "up" and "down" arrows will adjust the
corresponding fader setting in 0.5dB increments. Next to each fine adjustment
control is a numerical fader readout that is always current and active.

PEAK METERS

Each peak meter indicates an audio signal level in "dB relative to full-scale."
This means that a full-scale signal is referred to as "0 dB" and a signal that is
12 dB 'quieter' than full-scale is referred to as "-12 dB". The meters are
vertically color-coded into three sections: green, yellow and red. The green
section represents a safe zone, ranging from approximately –48 dB to –12 dB.
Most audio signals should appropriately fill this section of the meter. The
yellow section ranges from –12 dB to –3 dB as the signal approaches a 'hotter'
level. For best capture resolution, it is recommended to adjust the output gain
of the source or the input gain of the board so as to visualize the level in this
area. The red section of the meter ranges from –3 dB to 0 dB. On the input
level meters, a 0 dB condition indicates overload and audio clipping may
occur. Therefore make sure to adjust the incoming audio levels so that they do
not peak in the red section too long. On all output level meters, 0 dB indicates
full-scale output. Unlike the inputs, hardware clipping is impossible on the
outputs because of the 36-bit resolution built into the mixer hardware.
However, note that it is possible to mix multiple tracks within your software
application and cause clipping to occur in the output stream before it reaches
the VX442 output hardware or monitor mixer.
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