Alto Professional ZMX124FXUSB Quick Start Manual - Page 5

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TOP PANEL FEATURES
Note: The channels have essentially the same controls with some
minor variations between Channels 1-4, 5-8, 9-12.
different channel types are shown here.
1.
MIC INPUT – Connect a microphone to these inputs with an
XLR cable.
2.
LINE INPUT – Connect line-level devices to these inputs
with 1/4" cables.
3.
INSERT – Use a standard 1/4" TRS cable to connect an
external processor (such as a compressor, limiter, external
EQ unit, etc.) to this jack. The signal will be taken after the
channel's gain control and returned before the channel's EQ
controls.
4.
GAIN – Adjusts the channel audio level (pre-fader and pre-
EQ gain). Adjust this so that the PEAK LED just barely lights
up during the loudest parts of the song.
5.
LOW CUT FILTER – When this button is depressed, that
channel's audio will be sent through a 75 Hz low-frequency
filter with a slope of 18 dB per octave. This is useful for
reducing hum and other low-frequency noise when using
microphones.
6.
HI EQ (TREBLE) – Adjusts the high (treble) frequencies of
the channel.
7.
MID EQ – Adjusts the mid-range frequencies of the channel.
8.
MID FREQUENCY SELECTOR – Adjusts the frequency
band affected by the MID EQ knob.
9.
LOW EQ (BASS) – Adjusts the low (bass) frequencies of the
channel.
10.
AUX SEND CHANNEL VOLUME – Adjusts the audio level
sent from that channel to the Aux Channel (which is sent out
the AUX SENDS and controlled by the AUX SENDS
VOLUME knobs). The top two knobs can adjust the pre- or
post-fader levels (as determined by the AUX PRE-/POST-
FADER SWITCH). The bottom knob can adjust the level of
the signal sent to the mixer's effects processor.
11.
AUX PRE-/POST-FADER SWITCH – When the button is
depressed, the audio sent to the corresponding AUX SENDS
is taken before the channel's fader.
raised, the audio sent to the AUX SENDS is taken after the
channel's fader.
12.
CHANNEL PAN / BALANCE – If this knob is labeled "PAN,"
it adjusts the (mono) channel's position in the stereo field. If
the knob is labeled "BAL," it adjusts the balance between the
two mono channels of that stereo signal.
13.
PEAK LED – The LED will flash if the signal is clipping. If
this happens, decrease the setting of the GAIN knob or
CHANNEL FADER.
14.
CHANNEL FADER – Adjusts the audio level on the channel.
15.
CHANNEL MUTE – Press this button to mute/unmute the
channel. The channel's audio will only be sent to its INSERT
or heard in the Solo Channel when its SOLO button is
depressed.
16.
CHANNEL ASSIGNMENT – Use these buttons to send the
channel to a subgroup, multiple subgroups, and/or the main
mix. Subgroup levels are controlled by the SUBGROUP
VOLUME FADERS; the main mix level is controlled by the
MAIN MIX FADER.
17.
SOLO – When this button is depressed, the audio will be heard in the Solo Channel, which will become the
only audio sent to the PHONES OUTPUT and CTRL OUTS. The LED METERS will also display the audio
levels, which are controlled by the PHONES and CTRL ROOM volume knobs.
The three
When the button is
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