Apple Logic Pro 9 - Manual (Page 1335)

SPP Abbreviation for Song Position Pointer, a MIDI clock timing pulse sub-message that
indicates the current “song” (project) position. It is accurate to bars (and beats for some
devices), but is not as accurate as MIDI Time Code (MTC). If you have a choice of these
two when synchronizing Logic Pro, choose MTC (see both the MIDI Clock and MTC entries).
staff style A staff style determines the appearance of notation on a musical staff. You
can define note sizing and spacing, number of staff lines, fonts, and more for each staff
style.
Standard MIDI file (SMF) Standard file format for exchanging songs between different
sequencers or MIDI file players. Standard MIDI files are not specific to a particular sequencer
program, type of computer, or device. Any sequencer should be able to interpret at least
the type 0 MIDI file format. Standard MIDI files contain information about MIDI events,
including time positions and channel assignments, names of individual tracks, instrument
names, controller data, tempo changes, and more.
status byte First byte in a MIDI message, which determines the type of message.
Step Input function The Step Input function allows you to insert MIDI notes—one at a
time—into a MIDI region, when Logic Pro is not in a real-time recording mode. This allows
you to input notes that may be too fast for you to play, or may be useful if replicating
sheet music, but you don’t sight read. Step input can be performed onscreen with the
mouse or with the computer or MIDI keyboard, or any combination of these devices. Also
see In button.
step sequencer While all sequencers, including Logic Pro, step through a series of events,
this term is used to describe a device from the seminal years of analog synthesisers.
Essentially, two rows of knobs (usually 8) were individually adjusted to control the gate
time (note length) and pitch of a connected synthesizer. The sequencer would step
through these knob settings once, or repeatedly. Many modern software instruments,
particularly drum synthesizers, include an integrated step sequencer that synchronizes
with Logic Pro playback. Ultrabeat incorporates a step sequencer which is considerably
more flexible than its ancient analog cousins.
stereo Short for stereophonic sound reproduction of two different audio channels.
Compare with mono.
subframe A sub-division of a SMPTE frame, corresponding to the individual bits of a
SMPTE frame. One frame consists of 80 bits.
surround Surround indicates playback systems that make use of multiple speakers. The
most common surround format is 5.1 channels (front left, front center, front right, left
surround, right surround, and an LFE, or subwoofer, channel), typically used in home
theater systems and in cinemas. Logic Pro supports all common surround formats, and
provides surround recording, plug-in, and mixing facilities.
1335 Glossary