Phonic AM844D Manual Del Usuario página 7

22. +4/-10dB Buttons
Located on stereo channels 9-10 and
11-12, these buttons select the input
signal level, allowing the mixer to bet-
ter adapt to different operating levels.
If the input source is -10 dBu (con-
sumer audio standard), it is best to
engage the switch, allowing the signal
to be heard. If the input source is +4
dbV (professional audio standard) the
corresponding input channel's button
should be disengaged to ensure the
integrity of the Mixer's circuitry. If you
are unsure of the source's operating
level, we suggest leaving the switch disengaged until you test the
source's signal. You can then engage if necessary (if the level of
input is obviously too low).
23. High Frequency Control
Use it to give a shelving boost or cut
of ±15 dB to high frequency (12 kHz)
sounds. This will adjust the amount
of treble included in the audio of the
channel, adding strength and crisp-
ness to sounds such as guitars, cym-
bals, and synthesizers.
24. Middle Frequency Control
You can provide a peaking style of
boost and cut to the level of middle
frequency sounds at a range of ±15
dB with this control. The AM 844D
mixer also provides a sweep control,
allowing you to select a center fre-
quency between 100 Hz and 8 kHz.
Changing middle frequencies of an audio feed can be rather dif-
ficult when used in a professional audio mix, as it is usually more
desirable to cut middle frequency sounds rather than boost them,
soothing overly harsh vocal and instrument sounds in the audio.
The stereo channels of the AM 844D mixer feature a High-Mid
and Low-Mid control instead of the typical controls described
above. They provide a peaking style of boost and cut to middle
frequencies, where the frequencies are set at 3 kHz and 800 Hz
for the High- and Low-Mids respectively.
25. Low Frequency Control
This control is used to give a shelving boost or cut of ±15 dB to
low frequency (80 Hz) sounds. This will adjust the amount of bass
included in the audio of the channel, and bring more warmth and
punch to drums and bass guitars.
26. AUX Controls
These four AUX controls alters the
signal level that is being sent to the
auxiliary 1 to 4 mixing buses, the
signal of which is suitable for con-
necting stage monitors, allowing
artists to listen to the music that is
being played. AUX 1 and 2 feature a
Pre/Post button, which alternates the
feed to the AUX mixing bus between
a post and pre-fader feed. AUX 3, on
the other hand, acts as an EFX send,
the signal of which can be used in
conjunction with external signal pro-
cessors (which can be returned to
the mixer via the AUX return input),
or simply as an Auxiliary output. Both
the AUX 3 (EFX) and AUX 4 controls
are post fader and are sent directly
to the corresponding outputs.
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27. Pan / Balance Controls
This alternates the degree or level of audio that the left and
right side of the main mix should receive. On mono channels,
the PAN control will adjust the level that the left and right should
receive (pan), where as on a stereo channel, adjusting the BAL
control will attenuate the left or right audio signals accordingly
(balance).
28. On Button and Indicator
This turns the channel on, allowing the user to use the feed
from the channel's inputs to supply the MAIN L/R, GROUP 1/2,
GROUP 3/4, AUX and EFX buses (as specified by the user, of
course). The corresponding indicator will be illuminated when
turned on.
29. 1-2, 3-4 and L-R Buttons
These handy buttons allow you to decide the audio path of the
corresponding channel. Pushing the "1/2" or "3/4" buttons allows
the signal to be sent to the Group 1/2 or 3/4 mixes respectively,
where the "L-R" allows it to be sent to the Main L/R mix.
30. Peak Indicator
This LED indicator will illuminate when the channel hits high
peaks, 6 dB before overload occurs. It is best to adjust the chan-
nel level control so as to allow the PEAK indicator to light up on
regular intervals only. This will ensure a greater dynamic range of
audio. This indicator also doubles as a Solo indicator, when the
SOLO button is engaged.
31. Solo Button
The Solo button is pushed to allow the signal of the correspond-
ing channel to be sent to the Control Room / Phones mixing bus
(pre or post fader, depending on the properties selected by the
pre / post button, located by the Control Room / Phones source
buttons), for use with either headphones or studio monitors. This
button also allows for easier isolation of individual channel sig-
nals, ensuring setting of the input gain or tracking of audio by
sound engineers is made simpler. The Peak indicator above the
Solo button also doubles as a Peak Indicator, illuminating when
the signal reaches high peaks.
32. Channel Level Control (Fader)
This control will alter the signal level that is sent from the corre-
sponding channel to the corresponding mixing buses.
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