Apple Logic Pro 7 User Manual download pdf (Page 369)

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Chapter 9 Audio Window 369

Split and Interleaved Stereo Formats

The internal structure of multi-track hard disk recording systems is such that each

individual audio track can be dealt with independently. Accordingly, a separate audio

file is created for each track.

Logic can record stereo files in two different ways, one of which is by coupling two

mono tracks, and therefore two audio files. This is known as the “split stereo” format.

Select Audio > Audio Preferences > Force record & convert interleaved into split stereo file(s)

if you want Logic to use this format.

Logic normally creates single files containing both channels of a stereo recording. This

is called the “interleaved stereo format”. These are composed of a Region consisting of

small alternate data packets from both tracks. Logic can record files directly in the

interleaved format, giving stereo files recorded in Logic instant compatibility with other

mastering or CD recording applications. Please note that not all hardware and driver

models are compatible with this format, so all files recorded on these systems will be in

the split stereo format. Please read more about this topic in the Universal Track Mode

section.

The sections below on “split stereo” files only apply to the abovementioned hardware

systems:

Automatic Conversion of Stereo Files

When the automatic conversion of stereo files is selected, the original stereo sound file

is not deleted—Logic generates two new independent mono files from the stereo

sound file. Don’t forget that this process takes up twice the amount of space on the

hard disk.

The two new audio files are linked together in the Audio window to make a single

“stereo unit”. Any edits carried out on one channel, automatically affect the other

channel.

Special Features of “Split” Stereo Files

There are a few special features for dealing with “split stereo” sound files:

• In the file selector box, “split stereo” audio files are treated as a single file, even

though strictly speaking, they are two independent files.

• In the audio list you can see both files. They have the same name—apart from the

channel markings (L and R). If you rename one channel of a stereo audio file, the file

for the other channel is automatically renamed as well.

• Their Regions can also be renamed.

• If you use the Add Region command to create a new Region, Logic does this for both

audio files.

• Any alteration made to either Region is automatically transferred to the other Region.

This applies to the start point, end point, and position of the Anchor.

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Apple Logic Pro 7 User Manual Page 369

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