7
Level
Bargraph Display – Shows the program level. Its first yellow LED indicates a level of
0
VU
, equal to
+4dBv
at the
VGM-804
’s balanced output. Each LED above or below this point
represents a change of + or – 3dB output level.
If your sound system’s level has been set up according to the recommended
procedure on page 5, a comfortable level for spoken material often reaches the first or
second yellow LED. Dramatic or musical material can often be played louder, covering the
entire yellow range into the first
red
LED. Use the meter as a guide – although your ears,
and the audience response, are your best judge of how much sound to provide.
COMPRESS
LED – This LED displays the status of the
VGM-804’
s compression system. It
lights whenever compression is limiting the sound level. For each microphone channel with
compression enabled, limiting begins to occur at approximately at 0 VU (roughly the first
yellow LED of the level display). The
COMPRESS
LED
shows
green
at 3dB gain reduction,
yellow at 6dB, and
red
when compressing by 9dB. The compressor’s
THAT® Analog Engine
IC compresses with virtually inaudible distortion.
To use the mixer’s compressor, first make sure that compression is enabled on the
desired mic inputs (see page 4). Then adjust each mic’s level control until the
COMPRESS
LED
blinks
green
and perhaps yellow on level “peaks”. If totally dark, you might want to turn up
that channel. On the other hand, if the
COMPRESS
LED illuminates
red
, the channel in use is
set too high and constantly “hitting” the compression. In that case, reduce that mic level.
If you find that the
COMPRESS
LED remains dark for all situations, or lights
red
even
though the sound is barely adequate, adjust the volume of your power amplifier accordingly
– repeat the procedure on Page 5.
When the VGM-804 is driven into compression by excessively loud mic(s), it regulates
its output level within the compressed range. The resulting gain reduction affects
all
inputs.
For example, loud speech into a compressed mic can reduce the level of music playing
through an auxiliary input (sometimes called
talk over
operation).
AUX 2
COMPRESS
VGM804
Power
On
0 VU (+4dBv)
output
Compress
LED
Output Level
