Apple Logic Pro 7 User Manual download pdf (Page 193)

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Chapter 4 Audio in the Arrange Window 193

Genuine Mixdown with Clipscan

If you combine audio data from two or more tracks, the current pan and volume values

for the individual tracks will define the pan and volume settings in the new audio file. If

you want to combine both sides of a stereo audio file (a mono channel on each of two

tracks), first set the pan controls of the component mono sides to hard left and hard

right, respectively.

You can perform a mixdown while the sequencer is playing.

Following the digital clipping scan (Clipscan) and completion of the mixdown, Logic

replaces the previously selected Regions with one Region that contains the new,

mixed-down audio file in it’s entirety. You can use the undo function to restore the

original audio Regions, if desired. If you do so, you’ll be asked if you’d like to keep, or

delete, the newly created mixed audio file. If you decide to keep it, it will remain in the

Audio window, and can be further processed.

During a mixdown, the 32-Bit resolution Clipscan function ensures that the highest

possible level is maintained, without clipping.

Audio Crossfades in Digital Mixdown

The Digital Mixdown function (Glue tool, menu, or key command) in the Arrange

window supports audio crossfades of selected Regions.

The parameters are defined in the General Audio preferences pane, which can be

opened either via the Audio Crossfade options for Merge key command or by

selecting: Preferences > Audio > General.

There are two parameters:

Crossfade Time [ms]: This is the length of the entire crossfade. To switch off the

crossfade, set this value to zero.

Crossfade Curve: To obtain a linear crossfade, set this value to zero. Other values

(positive or negative), produce various exponential fades. The fade-outs and fade-ins

are always symmetrical, to avoid deviations in level. The preset values are: Time =

20 ms, Curve = 0 (linear).

The graph shows the actual shape of the crossfade; the original algorithms are also

used to calculate the curve display. Values over about 250 ms are scaled in the graph,

to ensure that the entire crossfade is visible.

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Apple Logic Pro 7 User Manual Page 193

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