Roland VS-2480 - Manual (Page 419)

Glossary
Roland VS-2480 Owner’s Manual www.rolandus.com 419
MIDI
For “Musical Instrument Digital Interface,” the wiring and message protocol that allows the
VS-2480 and other MIDI devices to communicate by exchanging instructions called “MIDI
messages.”
MIDI control surface
A hardware device that transmits MIDI messages, and whose purpose is the control of a
second MIDI device.
MIDI Control Change messages
A type of MIDI message that’s permanently assigned to a particular parameter. When you
send a MIDI Control Change value, it sets the value of the parameter in the MIDI device
that receives it.
MMC
Short for “MIDI Machine Control.” MMC messages are a type of MIDI message that
communicates button-press instructions—PLAY, STOP, etc.—between MIDI devices.
MTC
For “MIDI Time Code,” a form of SMPTE time code that travels between MIDI devices
through MIDI cables.
Pad
“Pad” has two meanings in the VS-2480. An input pad lowers an input jack’s signal by 20dB.
In Phrase Pad and Phrase Sequencer modes, each TRACK STATUS/PHRASE PAD button
acts as a phrase pad that you can strike with your fingers to play a phrase on the
corresponding hard disk recorder track.
Panning
Panning controls how much of a signal is sent to the left and/or right speaker in a stereo
system, creating the illusion that the sound is occurring at a physical location between the
two speakers.
Phase Cancellation
Each sound wave is a series changes in air pressure that your ears interpret as sound. It’s
possible to have two identical or very similar sound waves that conflict: at the exact
moment when one is increasing air pressure, the other is lowering it. The result is that the
two sound waves cancel each other out, and neither is heard. This is called “phase
cancellation.” The problem can be solved by turning the air pressure changes of one of the
signals upside down so that both soundwaves agree—this is referred to as “inverting,” or
“flipping,” the signal’s “phase.”
Phrase
A phrase is a set of pointers that instructs the VS-2480 when and how to play a take—an
audio file—stored on its hard drive. See “Take.”
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