Apple Logic Pro 7 User Manual download pdf (Page 337)

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Chapter 8 Global Tracks 337

Beat Mapping Track

A note for experienced Logic users: This function replaces the Reclock function of

previous Logic versions. The Beats from Region function corresponds to the previous

Guide Sequence option for mapping bar positions to notes, but it’s easier to handle.

Basic Concept

You will generally play to a metronome click when recording in Logic. There are,

however, instances where you’ll want to record without a click, playing rubato, or at

least not at a strict same tempo throughout. Another situation may be where you have

an existing audio recording that wasn’t recorded to a metronome click (and therefore

contains slight tempo variations) that you want to add additional tracks to. In these

situations, the Beat Mapping track helps to make the display of these types of

recordings rhythmically meaningful—by defining the bar positions of existing musical

events (both MIDI notes and accents in Audio Regions) without changing their

absolute time position, thereby preserving the audible result with its original timing.

This is achieved in two steps: First, you graphically connect musical events (MIDI notes

or Transients in Audio Regions, which correspond to the beginning of strongly accented

notes) to the desired bar positions in the Beat Mapping track, by drawing lines

between them with the mouse (a more detailed description of this procedure follows

below). Logic will automatically insert a tempo change event for each of these bar

position locations, causing the note to be played at its previous absolute time position,

despite its altered bar position. A Logic song processed in this way will contain the

same tempo variations as the original recording.

Presuming accurate Beat Mapping, everything will be “in time” with the metronome

tempo, affording you a number of advantages for further song development:

• The metronome click can be used when recording additional Regions.

• Quantize functions can be applied to newly recorded Regions.

• Loops (both MIDI and Apple Loops) will automatically adjust to the tempo when

used in the arrangement.

• MIDI Regions recorded without a click will be displayed in a musically meaningful

way in the Score Editor.

• Additional MIDI Regions can also be created via the Step Input function, without

sounding too “stiff”. This looser feel is due to the parts being played back with all

tempo changes created by the Beat Mapping process.

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Apple Logic Pro 7 User Manual Page 337

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