SoundCraft M-SERIES User Manual page 33

USER GUIDE
peak LED a visual indication of the signal peaking just before the onset of clipping.
PFL a function that allows the operator to monitor the pre-fade signal (pre-fade listen)
in a channel independently of the main mix.
phase a term used to describe the relationship of two audio signals. In-phase signals
reinforce each other, out-of-phase signals result in cancellation.
polarity a term used to describe the orientation of the positive and negative poles of an
audio connection. Normally connections are made with positive to positive,
negative to negative. If this is reversed, the result will be out-of-phase signals (see
'phase' above).
post-fade the point in the signal path after the monitor or master fader and therefore affected
by fader position.
pre-fade the point in the signal path before the monitor or master fader position and
therefore unaffected by the fader position.
rolloff a fall in gain at the extremes of the frequency response.
shelving an equaliser response affecting all frequencies above or below the break frequency
i.e. a highpass or lowpass derived response.
spill acoustic interference from other sources.
transient a momentary rise in the signal level.
unbalanced a method of audio connection which uses a single wire and the cable screen as the
signal return. This method does not provide the noise immunity of a balanced input
(see above).
+48V the phantom power supply, available at the channel mic inputs, for condenser
microphones and active DI boxes.
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