Apple Logic Pro 9 - Manual (Page 1334)

Signature track Global track that shows all time and key signatures of a project.
Single Trigger mode This term is associated with synthesizers such as the ES1. In this
mode, envelopes are not retriggered when tied (legato) notes are played.
SMF See Standard MIDI File.
SMPTE Abbreviation for Society of Motion Picture and Television Engineers. The organization
responsible for establishing a synchronization system that divides time into hours, minutes,
seconds, frames, and subframes (SMPTE time code). SMPTE time code is also used for
synchronizing different devices. The MIDI equivalent of SMPTE time code is MIDI Time
Code (MTC). See MTC.
SMPTE ruler In addition to the standard bar/beat display, the Logic Pro Bar ruler can
display time units in SMPTE format: hours, minutes, seconds, and frames, and can display
time code if a video is imported into the project.
Snap pop-up menu A pop-up menu found in the local menu of linear editing windows.
It determines the behavior of regions or events when edited; lengths and cuts will snap
to the nearest possible position (as determined by the chosen Snap menu value), for
example.
software instrument Software counterpart to hardware samplers or synthesizer modules,
or acoustic sound sources such as drumkits or guitars. The sounds generated by software
instruments are calculated by the computer processor, and played via the audio interface
outputs. Often colloquially called softsynths or softsamplers.
solo A way to temporarily highlight one or more tracks or regions or events, allowing
them to be heard in isolation.
Solo tool Click-holding individual regions or events with the Solo tool temporarily allows
them to be heard in isolation. All other objects are muted.
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 Each channel of multi-channel audio files (stereo or surround)
are usually dealt with together. These files are said to be interleaved. Edits to one channel
will affect the others equally. Logic Pro allows you to separate these files, making them
split channel audio files, enabling independent edits to each. Also see interleaved audio
file.
1334 Glossary