Mackie TT24 Owner's Manual - 5.2 Master L/r and C/mono
24
TT24 DIGITAL LIVE CONSOLE
TT24 DIGIT
AL LIVE C
ONS
OLE
Ch 5: DSP and Internal Effect Allocation
5.2 Master L/R and C/Mono
The Master L/R and C/Mono bus has the following
signal path: six-band parametric EQ, 31-band graphic EQ,
compressor, and master fader.
5.2.1 L/R+Mono and LCR Modes
The TT24 has two master mix operating modes:
L/R+Mono:
Stereo with an independent mono output.
LCR:
True LCR panning from the channels and busses.
L/R+Mono
In L/R+Mono mode, the left and right stereo signals
are available at the
LEFT
and
RIGHT
outputs, the mono
signal from the
CTR/MONO
output. Channels can be as-
signed to both outputs. The channel sends to
CTR/MONO
are pre-pan, so the channel pan setting has no effect.
The L/R and Mono master levels and processing are
linked by default, but they can be independent (see
page 13). When unlinked, the
MASTER
fader controls
the
LR
output and the
C/Mono
fader (channel 24 on the
MASTERS bank) controls the mono output (which can
also be controlled on the Master OVERVIEW Touch-
screen). When linked, all processing is linked and the
Master fader controls all levels. A relative offset be-
tween
LR
and
CTR/MONO
may be set using the Master
OVERVIEW Touchscreen faders or the faders for chan-
nel strips 22–24 in the MASTERS bank.
LCR
In LCR mode, the
LEFT
,
CTR/MONO
, and
RIGHT
outputs present the LCR signal. Channels can be as-
signed to LR, Center, or LCR. A channel assigned to
Center only is routed pre-pan, so the channel pan does
not affect the Center signal. Channels assigned to LR
only are routed to the
LEFT
and
RIGHT
outputs using
stereo pan positioning. Channels assigned to LCR are
routed to
LEFT
,
CTR/MONO
, and
RIGHT
outputs using
true LCR panning.
The LCR master levels and processing are linked
by default but can be unlinked and processed inde-
pendently by pressing the
LINK
button in the Master
OVERVIEW Touchscreen. When unlinked, the
MASTER
fader controls the
LEFT
and
RIGHT
outputs and the
C/Mono
fader (channel 24 on the
MASTERS
bank) con-
trols the Center output (which can also be controlled on
the Master OVERVIEW Touchscreen). When linked, all
processing is linked and the
MASTER
fader controls all
levels. A relative offset between the
LEFT-RIGHT
and
CTR
may be set using the Master OVERVIEW Touch-
screen or by using the faders for channel strips 22–24 in
the
MASTERS
bank.
TECH NOTE:
The TT24 uses 12 SHARC DSP
chips with embedded algorithms. This DSP
approach differs from conventional digital
audio workstations in that the algorithms are
programmed as firmware on the DSP chips.
The incoming audio signal is digitized by its
ADC and then routed through the DSP chip
whether or not processing is engaged. This
ensures equal latency for all incoming audio
sources.
This chapter discusses how the TT24 allocates its DSP
and Internal Effects resources.
See Chapter 6:
Touchscreen and TT Control
for specif-
ic information about the DSP and Effects Touchscreens.
See
Tabular Summary of DSP and Effects
on page 28
for parameter reference.
5.1 Analog, Digital, and Line
Inputs
Analog Inputs
Analog input channels 1–24 route to their DSP
block immediately after the ADC and before routing to
outputs, groups, and auxes. The signal flow is: vari-
able-frequency high-pass filter, adjustable gate, EQ
and compressor (the EQ and compressor order can be
switched for each channel), channel fader, pan and as-
sign sections.
Digital Inputs
The ADAT Optical digital input channels 25–48 have
no DSP. Their signals enter the board, pass through
the channel meter and can be routed to the Mains, Aux
Sends, and Groups/Matrix as needed.
NOTE:
The UFX II expansion card provides additional DSP for these
inputs.
Line Inputs
Each Line Input can access a four-band parametric
EQ. Odd/even adjacent inputs can be stereo linked (see
page 13).