Ableton Live Intro Manuel d'instructions télécharger pdf (Page 366)

CHAPTER 30. AUDIO FACT SHEET 364

we will never release an update unless it passes every test.

30.2 Neutral Operations

Procedures in Live that will cause absolutely no change in audio quality are referred to as

neutral operations. You can be sure that using these functions will never cause any signal

degradation. Applying neutral operations to audio that was recorded into Live ensures that

the audio will be unchanged from the point of analog-to-digital conversion. Applying neutral

operations to les imported into Live ensures that the imported audio will be identical to the

les saved on disk. Applying neutral operations to les being exported from Live ensures

that the quality of your output le 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:

30.2.1 Undithered Rendering

The Export Audio command renders Live's audio output to a le on disk. Rendering is a

neutral operation under certain conditions:

the sample rate of the rendered le is the same as that set for the audio hardware in

Live's Preferences.

no non-neutral operations have been applied.

Live's rendering performance is tested by loading three types of unprocessed audio les

(white noise, xed-frequency sine waves and sine sweeps) in 16-, 24- and 32-bit word lengths

and rendering these to output les, also with varying bit resolutions. Phase cancellation

testing of the original and output les shows the following:

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Ableton Live Intro Manuel d'instructions Page 366