8

436 Glossary
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.
MIDI Multi mode Multi-timbral operating mode on a MIDI sound module where
different sounds can be controlled (polyphonically) on different MIDI channels. A multi
mode sound module behaves like several polyphonic sound modules. General MIDI
describes a 16-part multi mode (the ability to control 16 different parts individually).
Most modern sound generators support multi mode. In Logic Express, multi mode
sound modules are addressed via multi instrument objects. This MIDI mode and multi
mode sound modules are generally referred to as multi timbral (see multi timbral).
MIDI Time Code (MTC) Translation of a SMPTE time code signal into a MIDI standard
time code signal. MTC is used to synchronize Logic Express with MIDI devices, other
sequencers, video and audio tape or hard disk machines that support MIDI Time Code.
MTC determines absolute time positions and supports start, stop, and continue
messages.
mixdown A term commonly used to describe either bouncing (see bounce) or
merging of tracks (see merge).
mixing The process of shaping the overall sound of a project by adjusting the volume
levels, pan positions, adding EQ and other effects, and using automation to
dynamically alter these and other aspects.
M-LAN A Yamaha designed variant of the FireWire interface. It enables Yamaha digital
mixers and other devices to be directly connected to a Macintosh FireWire port (see
FireWire).
modifier key Computer keyboard keys used in conjunction with alphabetical keys to
change functionality. Modifier keys include Control, Shift, Option, and Command.
modulation Generally, a slight, continuously varying change. Many Logic Express
effects and synthesizers contain modulators.
modulation amount The strength, or intensity, of modulation.
modulation matrix The EXS24 mkII (and some other Logic Express instruments)
contains a grid that allows you to vary a number of target parameters, such as pitch,
with a number of modulators (modulation sources). This grid is referred to as the
modulation matrix in the EXS24 mkII.