AUX SENDS
a. An Output jack on the back of the console (pre / post fader)

b. duplicates the signal and sends it out of the console

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– used for headphone (cue) mix in RECORD mode

– used for sending signal to external processors in MIX mode, creating an EFX Loop

channel path RECORD MODE
Mic Trim Insert AuxSend EQ Fader Pan

Routing
Matrix

Group
Bus

MTR

MTR
Multitrack Tape Recorder

– a recording destination, such as

1. analog MTR
2. digital MTR
3. ProTools hard disk recording system (MSV)

Insert
a. An Input / Output jack on the back of the console

b. Used for “inserting” processors into the signal flow path such as Compressors & Noise Gates

Pan
Mix mode = choose left or right

Record mode = choose odd & even tracks

– works in conjunction with routing matrix

Channel Fader
set to UNITY GAIN* in RECORD mode

– last gain stage of individual channel

UNITY GAIN – position of Fader (0dB)

* Unity gain means no change in level of signal.

Trim
a. first gain stage
b. pre-amplifier
c. used to set record level
Routing Matrix
a.k.a. “channel assignments”

Selects which group bus the signal is sent to. (1/2 3/4 L/R)

If no buttons are pressed, the signal flow will stop “dead in its tracks.”

EQ
Frequency = Pitch

* Range of Human Hearing = 20Hz – 20kHz (cycles per second)

* 3 Band EQ on Mackie. (Lows, Mids & Highs)

Low EQ (1 knob)
TYPE = shelving type

– Boost or Cut a fixed range of frequencies

RANGE = 80Hz and below

Mid-range EQ (2 knobs)
TYPE = semi-parametric or sweepable

– Boost or Cut a Fixed bell-curve width

– Adjustable center frequency of bell-curve within fixed RANGE

RANGE = 100Hz – 8kHz

High EQ (1 knob)
TYPE = shelving type
– Boost or Cut a fixed range of frequencies
RANGE = 12kHz and above
Direct Out
– A set of Outputs on the Mixer (*Channels 1-8 ONLY)

– Post (after) -fader

– bypasses the group bus and the routing matrix

Group Bus
a.k.a. Sub Outs

– A set of Outputs on the Mixer
– Last Gain Stage of console in RECORD mode
– Several channels can be routed to one or more group busses in the Routing Matrix

Ex: for “Sub” mixing
1 2 3 4 L/R

DYNAMIC PROCESSORS
1. A processor that affects dynamics
(amplitude not frequency.)

Example: Compressor & Noise Gate

Compressor
1. Reduces the dynamic range of an audio signal by a set ratio if its amplitude exceeds a threshold.

2. Makes Loud parts Softer

a. Threshold – determines when the signal is effected by the compressor

* The signal is effected above the threshold

b. Ratio – the amount of compression

Noise Gate
Goal = Reduce Residual Noise

– A Noise gate allows a signal to pass through only
when it is above a set threshold: the gate is open. If
the signal falls below the threshold no signal is
allowed to pass: the gate is closed.

*The signal is effected below the threshold

Fully-Parametric EQ
1.) Adjustable center frequency
2.) Boost or Cut
3.) Q = change width of bell curve
shelving EQ
all frequencies above or below a certain frequency are boosted or cut by the same amount.
semi-parametric
generally means a parametric EQ that does not have a Q control (the Q is fixed)