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AM844D
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 chan-
nel, adding strength and crispness to sounds such
as guitars, cymbals, 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 frequency between 100 Hz and 8 kHz.
Changing middle frequencies of an audio feed can
be rather difcult when used in a professional au-
dio 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 au-
dio.
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 connecting 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 sig-
nal processors (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 corre-
sponding outputs.
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).
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