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Glossary 441
scale A group of related musical notes (or pitches) that forms the basis of the melody
and harmony in a piece of music. The most common scales are the major scale and
minor scale.
scan code Each key on a computer keyboard has a scan code rather than an ASCII
symbol associated with it. As an example: The plus and minus keys on the numeric
keypad and the corresponding keys above the keyboard have a different scan code,
but use the same ASCII symbol.
scroll bar and scroller Gray beam at the edge of a window. A movable box inside the
beam is used to select the displayed project section in the window.
SDII Sound Designer II audio file format. Very similar in structure to the AIFF file format.
self-oscillation Self-oscillation is a typical characteristic of analog filter circuits. It
occurs when the filter, at high resonance values, feeds back into itself and begins to
oscillate at its natural frequency.
semitone Smallest interval between two pitches in the standard diatonic scale, equal
to a half tone. A semitone is also called a half step or half tone.
send Abbreviation for auxiliary sends. An output on an audio device used for routing a
controlled amount of the signal to another device. Sends are often used to send several
signals to the same effect, which is useful for computationally-intensive effects such as
reverb.
sequencer A sequencer is these days considered to be a computer application that
allows you to record both digital audio and MIDI data and blend the sounds together
in a software mixing console. In earlier times, a sequencer controlled synthesizers via a
series of control voltages and gates, or via MIDI only. No audio recording or control was
available.
setting 1) A parameter value. 2) A set of plug-in parameter values that can be loaded,
saved, copied, or pasted via the Settings menu. A plug-in setting is also known as
preset. Also see preset and Settings menu.
Settings menu Found in the gray header at the top of all Logic Express plug-in
windows. Allows you to save, load, copy, and paste settings: the parameter values of
effects and software instruments.
shelving EQ EQ type that allows the frequency range above or below the specified
frequency to be increased or decreased.
side chain A side chain is effectively an alternate input signal—usually routed into an
effect—that is used to control an effect parameter. As an example, you could use a side
chained track containing a drum loop to act as the control signal for a gate inserted on
a sustained pad track, creating a rhythmic gating effect of the pad sound.