10.6

1190Logic Pro User Guide
solo To temporarily isolate one or more tracks, regions, or events, allowing them to be
heard without the rest of the project.
Solo tool A tool used to play a region or event in isolation.
S/P-DIF Short for Sony/Philips Digital Interface. A standard transmission format for
professional stereo digital audio signals. The format is similar to AES/EBU, but uses 75 ohm
coaxial or optical connectors and cabling. Depending on the type of devices involved, AES/
EBU and S/P-DIF coaxial interfaces can communicate directly. Most digital audio interfaces
available today will feature S/P-DIF connectors.
split channel audio files Often the channels of multichannel audio files (stereo or
surround) are interleaved, so that edits to one channel affect the others equally. Logic Pro
allows you to separate these files into split channel audio files, so that you can edit each
channel independently. See also interleaved audio file.
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), which is preferred when you
have a choice when synchronizing Logic Pro. See also MIDI Clock and MTC.
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) The 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, and tempo changes.
status byte The first byte in a MIDI message, which determines the type of message.
step A beam in the Step Editor that represents a MIDI event. The value of the event is
denoted by the beam height, providing an at-a-glance view of one, or dozens, of different
events and their values.
Step Editor A graphical editor in Logic Pro that can be used to create and edit MIDI note
and controller data. The Step Editor is ideal for drawing drum parts and creating crescendi,
among other tasks. In earlier versions of Logic Pro, the Step Editor was called the Hyper
Editor. See also event definition.
Step Input function A feature that allows you to insert MIDI notes into a MIDI region,
one at a time, when real-time recording is not active. This technique allows you to input
notes accurately, even when they may be too fast for you to play “live.” Step input can
be performed onscreen with the mouse or with the computer or MIDI keyboard, or any
combination of these devices. See also MIDI In button.
step sequencer Originally a hardware device from the early years of analog synthesizers
with knobs that controlled the gate time (note length) and pitch of a connected
synthesizer, now both hardware and software instruments, particularly drum synthesizers,
include an integrated step sequencer that synchronizes with project playback. Logic Pro
includes Step Sequencer, which lets you sequence not only drum and instrument sounds
but also stepped parameter changes, and provides greatly increased control and flexibility
in creating and playing patterns. Ultrabeat incorporates a step sequencer that is also more
flexible than a classic analog sequencer.