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Glossary 91
automation Automation is the ability to record, edit, and play back the movements of
all knobs, controls, and buttons, including: volume faders, pan, EQ, and aux send
controls, plus most effect and instrument plug-in parameters.
aux channel (strip) Aux channels are found in the Mixer (and to the left of the Arrange
window), and can be used as send/returns (buses) and sub-group controls.
Balance control Rotary knob directly above the Level fader of stereo channels. It
controls the relative level of the left and right signals at their outputs.
bar In musical notation, a bar is a measure that contains a specified number of beats,
and establishes the rhythmic structure of a musical piece.
Bar ruler Ruler found at the top of the Arrange, Piano Roll, Hyper Editor and Score
Editor windows. It displays musical time units, including: bars, measures, beats, and
beat divisions. It is used to set and display the project position, the cycle and
autopunch locators. Also see playhead, Cycle, and Autopunch.
bass A musical instrument. The term also refers to low frequency sounds or
components within a sound. See frequency.
beat A musical time interval: “The beat is the regular rhythmic pulse in a composition
that people tap their feet to.” Usually a quarter note.
beats per minute See bpm.
bit depth The number of bits used by a digital recording or digital device. The number
of bits in each sample determines the (theoretical) maximum dynamic range of the
audio data, regardless of sample rate.
bit rate Bit rate, when talking about MP3 files, refers to the transfer bit rate at which
the files are encoded. Conversationally, the term is more often used to describe the
relative quality of the file, with lower bit rates resulting in less defined audio.
bit resolution Alternative term for bit depth. See bit depth and sample rate entries.
bounce To process MIDI or audio regions with any applied effects, such as delay or
compression, and combining them into one audio file. In Logic, you can choose
between real time and offline bouncing. Offline bouncing is faster, but doesn’t allow
you to apply live automation or record real time audio input.
Bounce button You can bounce the output of any output channel to an audio file by
clicking the Bounce button. Also see bounce.
bpm Abbreviation for beats per minute, a measure of the tempo of musical piece. As
an example: 120 bpm means that in one minute, there will be 120 musical beats
(quarter notes).