Ableton Live - 9.0 Manual do Utilizador Página 574

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574 Audio Fact Sheet
files imported into Live ensures that the imported audio will be identical to the files saved on disk.
Applying neutral operations to files being exported from Live ensures that the quality of your
output file will be at least as high as what you heard during playback.
The list of neutral operations found below is provided primarily as an abstract reference; while
all of these operations are, in fact, neutral, it is important to remember that each of them may
(and almost certainly will) occur within a context that also contains non-neutral operations. For
example, running an audio signal through an effects device is a non-neutral operation. So any
neutral operations that occur after it will, of course, still result in audio that is altered in some
way. Even a gain change is, technically, non-neutral.
Neutral operations include:
33.2.1 Undithered Rendering
The Export Audio/Video (page 43) command renders Lives audio output to a file on disk.
Rendering is a neutral operation under certain conditions:
•the sample rate of the rendered file is the same as that set for the audio hardware in Lives
Preferences.
no non-neutral operations have been applied.
Lives rendering performance is tested by loading three types of unprocessed audio files (white
noise, fixed-frequency sine waves and sine sweeps) in 16-, 24- and 32-bit word lengths and
rendering these to output files, also with varying bit resolutions. Phase cancellation testing of the
original and output files shows the following:
rendering to a file with the same bit depth as the original results in complete phase cancel-
lation.
rendering to a file with a higher bit depth than the original results in complete phase can-
cellation.
•rendering to a file with a lower bit depth than the original results in the smallest amount of
distortion possible within a 32-bit system.
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