Apple Logic Pro 8 - Manual (Page 987)

Glossary 987
master channel strip Channel strip in the Mixer that acts as a separate attenuator
stage, changing the gain of all output channel strips without affecting the level
relationships between them.
Media area Area shown at the right-hand side of the Arrange window when the Media
button is clicked in the Arrange Toolbar. Contains the Bin, Loops, Library, and Browser
tabs, providing access to all media types supported by Logic Pro.
merge Mix, or combine, two or more MIDI events or regions into a single event or
region.
metadata Metadata is additional descriptive information that is stored in the file
header of a number of file types (AAF, for example). It is used to reference external
media, to simplify searches, and more.
metronome A device that produces a sound that taps out the beat. In Logic Pro, it can
configured in the Metronome project settings.
MIDI Abbreviation for Musical Instrument Digital Interface. Standardized,
asynchronous, serial, event-oriented hardware and software interface for electronic
musical instruments. MIDI is an industry standard that allows devices such as
synthesizers and computers to communicate with each other. It controls the pitch,
length, and volume of a musical note event, among other characteristics.
MIDI channel A MIDI channel is a “tube” for MIDI data, which flows through MIDI ports.
Up to 16 separate MIDI channels can pass through a port simultaneously. Tracks
recorded in Logic Pro can be directed to different tubes (channels), which can contain
different information, and play back through different sounds, assigned to each
channel. As examples, channel 1: piano, channel 2: bass, channel 3: strings, and so on.
This presumes that the recieving devices are capable of receiving data on more than
one channel, and that they are capable of playing back different sounds simultaneously
(see multi timbral).
MIDI Clock Short MIDI message for clock signals. It is used to provide a timing pulse
between MIDI devices. It is accurate to 24 ppqn (pulses per quarter note), although
some devices interpolate these pulse values, resulting in a more precise clock signal if
each device is capable of interpreting this additional information correctly. Also
see: SPP.
MIDI message A message transmitted via MIDI that consists of one status byte and
none, one, two, or many data bytes (with system exclusive commands). See event.