Yamaha PM-1000 Manual page 6

MASTER AND MONITOR MODULE
A. DIRECT/PLAYBACK (OUTPUT SOURCE
SELECT) SWITCH Selects the audio source applied
to the master module's input. Direct mode derives
audio from the program mixing bus numbered to
correspond to the module (or from any source
plugged into the Master In jack). Playback (PB)
mode derives audio from the correspondingly
numbered PB іп jack. In practice, the Direct/
PB switch selects between a live program and a
recorded program to drive the console output.
B. MONITOR MIX (SPEAKER MIX) CONTROLS
These rotary level controls, labeled CH-1 through
CH-4, derive audio from the line outputs of master
modules 1-4. A monaural mixdown of the line out-
puts is obtained by adjusting the four monitor mix
controls. This mono mix is brought to the Monitor
Out jack, where it can drive a power amplifier for
one or more loudspeakers. Since there are four
master modules, each with an identical complement
of four monitor mix controls, up to four distinct
speaker mixes can be derived from the original four
line outputs. This is known as a 4x4 matrix with
level controls.
C. MONITOR MASTER (SPEAKER LEVEL)
CONTROL Provides overall level control for the
mono mix created with the monitor mix controls
immediately above it. When the four monitor out-
puts are driving different loudspeakers, the Monitor
Masters adjust the balance between speaker feeds.
This 4x4 matrix arrangement offers far more flexi-
bility for speaker feeding than would be available
if the speakers were driven directly from the four
line outputs (Line A or Line B).
D. MASTER FADER (GROUP MASTER) Sets the
overall signal level applied to the main program out-
puts of the console, Line A and Line B. (Line A & B
are identical, redundant outputs, each consisting of
four connectors that derive audio from the Direct/
PB switches.) The Master fader governs the corres-
pondingly numbered line outputs, whether derived
from the program mixing bus (in Direct mode) or
the Playback input (in PB mode). Together, the four
faders are useful for balancing the levels of different
groups of inputs that have been assigned to the four
mixing buses; in this capacity, the faders are Group
Master controls.