Studiomaster Horizon 2012, User Manual

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In the down position the signal to the AUX controls 1&2 is sourced after (or post) the channel
fader (34). Any movement of the channel fader will also change the signal to the AUX controls.
This is useful when routing the AUX output(s) to additional external effects processors as
the blend of processed (wet) signal stays proportional to the untreated (dry) signal,
irrespective of the fader position.
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28.AUX controls 1&2
Auxiliary sends from the channel primarily used to create an independent mix for use in
a stage monitoring system but could also be used when additional effects are required.
See PRE / POST fader switch (27) switch for each option.
29.BAL control
Varies the signal to the L-R MIX output and the left & right speaker outputs. In the centre
position the signal equal on both left & right outputs
30.MUTE switch
When pressed the signal from the channel is turned off or muted. However, the signal to
the PFL switch is available so channels can still be monitored. It is good practice to mute
all unused channels to prevent unwanted signals or noise appearing at any of the outputs.
The red LED illuminates to indicate the channel is muted.
31.PFL button
When pressed the channel signal will be displayed on the Mix bargraph display and can be
heard at the headphone output. The source of this signal is after the channel EQ but before
the fader and mute switch. This is useful for setting the signal level in a channel before
'going live'.
The yellow LED illuminates to indicate when the PFL switch has been pressed.
32.PEAK led
The red LED indicates when signal peaks in the channel are approaching maximum level
and consequently a distorted sound. Pressing the PFL button will confirm this on the MIX
bargraph. Adjust the channel GAIN (20/22) control to reduce the signal to a more suitable
level.
33.SIG led
The green LED indicates when a signal is present in the channel. Depending on the type
of signal, the LED may flicker or remain constantly illuminated.
34.Channel fader
Controls the signal level from the channel to the L-R MIX faders, MIX output and hence to
the Amplifier speaker outputs. It also controls the signal level to DSP 1&2 controls and,
when Pre/Post fader switch (27) is in, AUX 1&2 controls.
dBu A standard reference voltage = 0.775V rms. Derived from the earlier dBm which was used a power
ratio in 600ohm circuits.
dBV A standard reference voltage = 1V rms.
DECIBEL (dB) A logarithmic method of measurement for acoustics and electronics. One decibel
(1/10th of a Bell) is the smallest change in loudness perceptible by the human ear, although 'trained
ears' can detect smaller changes. 0dB (acoustic) is the threshold of human hearing at mid range frequencies.
DELAY A delay is an electronic effects processor which samples a short sound and replays it back a short
time later to give an echo effect. Delays are also used in live sound to ensure that the sound from speakers
spaced apart from each other arrive at the listeners ears at the same time.
D.I. Direct Injection. Often a small 'D.I. box' is used to send a signal directly from a guitar or bass into the
console without first putting it through an amplifier and speaker and capturing the sound with a microphone.
ECHO The effect produced when sound is reflected off hard surfaces often reproduced artificially using
electronic equipment (see DELAY).
EFFECTS (FX or DSP) SENDS Any outputs from a channel or console that can be connected to external
equipment for extra sound processing. Usually effects sends are post fade so any level changes to the main
signal also adjust the signal sent for processing.
EQUALISATION (EQ) Tone Controls
FADER Volume control, often a linear or slider type volume control.
FEEDBACK The squealing sound produced when a microphone picks up its own amplified sound from a
loudspeaker.
F.O.H. Front of House. The speaker system which is used to project the sound from the stage to the audience.
It is also used to describe the position, in front of the stage, where the main mixing console is situated.
FOLDBACK (STAGE MONITOR) Sound which is sent from the main mixing position back to the stage so
the performers can hear it. Often, with a large sound system an entirely separate foldback (or monitor)
system with a dedicated console is located on one side of the stage so the performers can communicate
easily with the operator.
GRAPHIC / GRAPHIC EQUALISER / GEQ An equaliser that uses rows of slider controls to adjust the sound.
Each of the sliders will adjust one part of the frequency spectrum giving a visual display of which areas have
been cut or boosted.
GROUND Earth
HERTZ (Hz) A measurement of frequency. 1Hz = 1 cycle per second.
HIGH (or TOP) The treble or high frequency content of a sound or the speakers (often compression drivers
attached to horns or flares) used to reproduce it.
HOT The positive phase of a signal. Usually the red wire in a screened cable.
IMPEDANCE Similar to resistance, except that impedance also reflects the effect of any inductance or
capacitance in the circuit.