Roland VXpanded VS-880 Application Manual page 133

Phantom Power
A method of remotely powering the preamplifier or
impedance converter which is built into many
condenser microphones by sending voltage along the
audio cable. Phantom power is usually from 6 to 48
volts DC and is run along the same conductors that
carry the mic signal. The DC is separated from the
audio by using capacitors and special transformers.
Many professional recording mixing consoles supply
phantom power. In the cases where phantom power
is required, but not available from a mixer, you can
use an external power supply for the microphone.
Phone Plug (1/4")
Describes any of several varieties of 2-conductor or 3-
conductor audio connectors having a 1/4" shaft
diameter. The term phone plug is derived from the
original use of these connectors in early telephone
switchboard equipment. The male connector is the
plug and the female is the jack.
Tip-Sleeve (TS) phone plug
A 2-conductor phone plug (or jack) commonly
used for unbalanced audio connections.
Tip-Ring-Sleeve (TRS) phone plug
A 3-conductor phone plug commonly used for
balanced audio connections. Also used in some
systems' unbalanced patch points so that a single
cable assembly can handle the input and output
instead of separate cables; crosstalk can be a
problem in this application.
Phono Plug (RCA)
A 2-conductor connector commonly used for
unbalanced audio signal connections. Also known as
a "pin plug" or "RCA plug."
Ping Pong
A multi-channel recording procedure whereby
several recorded tracks are played back in "sync"
mode, mixed into one track, and re-recorded on any
open (unrecorded) track. This procedure is done to
make additional tracks available, and may be
repeated.
Also refers to a recording technique utilized in the
early days of stereo recording whereby a sound
source appears to move from one speaker to the
other.
132
VS-880 Application Guide
Pointer Based Editing
When you record sounds into the VS-880, they are
stored on the hard drive. Once on the drive, the
original recording is never changed. All of the
editing, copying and moving of the sound is actually
just moving and copying "pointers" to the original
sound. These pointers indicate when to start and
stop playing all or part of the original recording. The
advantage to this way of working is that copying or
moving or erasing part of a track is only changing
these pointers. Pointers take up virtually no disk
space, and the VS-880 can write or change pointers
instantly. That allows you to copy all 8 tracks of a
song instantly to another location without using
additional disk space. The fact that the VS-880's
editing is Pointer Based is also why it can have 999
levels of UNDO. The original audio is never touched,
just the pointers that tell the VS-880 when to play
and stop playing the original audio.
Polarity
Refers to the relative position of the high (+) and low
(-) signal leads in an audio system. When two
channels are reversed in polarity relative to each
other, and are either mixed together or fed to a stereo
speaker system, signal cancellations will occur. This
is usually not desirable.
Also refers to the positive and negative (or ground)
terminals of a battery or power supply.
Pop Filter
A cloth, foam, or similar shield placed over a
microphone to avoid "popping" sounds from sudden
bursts of breath. Also, an electronic filter that
attenuates low frequencies where the "popping"
sounds exist (a high pass filter with its cutoff at
approximately 70 Hz to 100 Hz).
Post
Refers to a signal input, output or routing point that
comes after something. Usually used in conjunction
with another term, such as post fader, post EQ, etc.; if
unstated, one may assume the term means post
fader.
Pre
Refers to a signal output, input or routing point that
comes before (precedes) something. Usually used in
conjunction with another term, such as pre fader, pre
EQ, etc.; if unstated, one may assume the term means
pre fader.
Pre-Fader / Post-Fader
Audio signals from an external source or a recorded
track come into a mixer and are then routed to a Buss
such as the Mix Output. If the audio signal is routed
to the Mix Output Buss PRE-Fader, then the faders
won't have any effect on the level of the sound in the
mix.