AM1204FX / AM1204FX USBR
5
English
20. Middle Frequency Control
This control is used to provide
a peaking style of boost and
cut to the level of middle
frequency (2.5 kHz) sounds at
a range of ±15 dB. Changing
middle frequencies of an audio
feed can be rather difficult
when used in a professional
audio mix, as it is usually
more desirable to cut middle
frequency sounds rather
than boost them, thereby
soothing overly harsh vocal
and instrument sounds in the
audio.
21. 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.
22. AUX / EFX Controls
The AUX 1 and 2 controls allow the user to send the
corresponding signal to the AUX 1 and 2 mixes, the final levels
of which are controlled by the AUX Send controls on the main
mixing panel. These signals are then sent to the corresponding
AUX Send Outputs for use with amplifiers and studio or stage
monitors, or simply in conjunction with
external processors. AUX 1 features
a pre-fader, pre-EQ signal, while AUX
2’s signal is post-fader, post-EQ. The
AUX 2 control doubles EFX control on
the AM1204FX and AM1204FX USBR,
adjusting the signal that is sent to the
built-in Digital Effects Processor.
23. Pan / Balance Control
This alternates the degree or level
of audio that the left and right side
of the main mix should receive. On
mono channels, this control will adjust
the level that the left and right should
receive (pan), whereas on a stereo
channel, adjusting the BAL control will
increase the left or right audio signals
accordingly (balance).
24. MAIN / ALT3-4 Button
This button turns a mute on the corresponding channel on and
off, stopping all audio from the channel input to the Main mix.
When a channel is muted, this audio – which would normally be
wasted – is redirected to the ALT 3-4 mix.
25. Peak Indicator
This LED indicator will illuminate when the device hits high peaks,
6 dB before overload occurs. It is best to adjust the gain of the
channel so that the PEAK indicator lights up on intervals only, if at
all. This will ensure a greater dynamic range of audio.
26. Level Control
This 60mm fader will alter the signal level that is sent from the
corresponding channel to the main mix.
27. +4 / -10 Switch
This button, located on both stereo
channels, is used adjust the input
sensitivity of the corresponding
channels. This will adapt the channel
to external devices that use different
operating levels. If the input source is
-10 dBV (consumer audio level), it is
best to engage the switch, allowing
the signal to be heard. The +4 dBu
level is suitable for professional
audio signals, which are considerably
higher than the consumer level.
However, 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 the input signal is obviously too
low).
USB Player / Recorder (AM1204FX USBR only)
28. USB Port
Connect your USB flash drive to this input. Once a drive is
connected, the files will initiate and the main menu will appear
on screen. Users are advised to format their USB memory sticks
with the FAT-32 file system.
29. LCD Display
This display will display the track number currently being played.
It also offers play, pause and record indicators as well as the
current play/record time.
30. Play/Pause Button
Push this button to start and stop playback and recording of the
currently displayed track. Starting a track after it is paused will
resume the track from the point at which it was paused (in both
record and playback mode). When in recording mode, push and
hold this button to finalize recordings
31. and Back/Next Buttons
Pushing these buttons will allow users to skip back and forwards
between tracks. When the menu is activated, these buttons are
used to scroll through on screen options.
32. /MENU (Stop/Menu Button)
Push this button to stop playback or recording when applicable.
Push and hold the button to access the USB recorder/player’s
main menu.
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