Apple Logic Express 7 - Manual (Page 148)

148 Glossary
envelope The envelope is the variation that a sound exhibits over time, an envelope
basically determines how a sound starts, continues, and disappears. Synthesizer
envelopes usually consist of Attack, Decay, Sustain, and Release phases.
Environment The Environment is Logic’s brain: it graphically reflects the relationships
between hardware devices outside your computer and virtual devices within your
computer. Beyond basic input and output handling, the Environment can be used to
process MIDI data in real-time, and can even be used to create processing “machines”,
such as virtual rhythm generators and step sequencers or complex synthesizer editors.
Environment layer A place in the Environment, used to organize Objects and making
usage easier. Objects of the same type (Audio Objects, for example) are generally
placed on the same layer.
Environment Mixer See Audio Mixer
EQ Shortened form of equalizer. Equalizers are used to boost or cut frequencies in an
audio signal. There are several types available in Logic.
equalization See EQ
Eraser A tool used for deleting items. Click a selected item to delete it. All other
currently selected items are also deleted.
event Individual MIDI command, such as a note on command. Continuous controller
movements (modulation wheel, for example) produce a quick succession of individual
events with absolute values.
export To create a version of a file, such as a Logic song, in a different format that can
be distributed and used by other applications.
filter effect Filters are effects you can apply to Audio or MIDI Regions (when streamed
or recorded as audio). They are designed to reduce a signal’s energy at a specific
frequency. A true filter always acts as a subtractive device, and doesn’t add anything to
the signal. The names of the individual filters illustrate their function. As an example: A
Low Pass filter allows frequencies that are lower than the cutoff frequency to pass.
Filter button Buttons in the Event List/Track Mixer, that allow you to hide/show
specific event types/channel strip types.
filter slope The filter slope is the steepness, or severity, of filter attenuation. As
examples, a filter slope of 6 dB per octave would sound much softer than a filter slope
of 12 dB per octave.
flanger The flanger effect is similar to the chorus effect, where a slightly delayed signal
(which is shorter than that of the Chorus) is fed back into the delay line input. Flanging
makes a sound thicker, and slightly “out of phase”.