CAKEWALK sonar x3, Справочное руководство

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Preparing audio for distribution
Mixing
has to do a separate export operation for each Groove Clip in the track, which is very time-
consuming. If you only have one Groove Clip in a track, and you have rolled out numerous
repetitions of the clip, SONAR exports a single clip that is the length of the original clip and all the
repetitions, which is not a time-consuming operation.
7. Audio Format. Ask your engineer what format the studio uses, Windows (RIFF Wave) or Mac
(AIFC).
8. Click the Save button.
9. SONAR exports the project as an OMF file. In the Save as Type field, select the OMF version
you want to save the project as. Version 1 is compatible with older applications. See your target
application’s documentation for information on which version it supports.
Dithering
Dithering. Whenever an audio signal is converted from a higher-bit resolution to a lower
resolution, it is necessary to apply dither to avoid introducing undesirable quantization noise or
harmonic distortion into the signal. The purpose of dither is to reduce the resulting distortion by
adding low-level random noise or “dither” to the audio signal. Different mathematical calculations are
used to generate dither, each method has advantages and disadvantages depending on the
particular operation. SONAR features the Pow-r dithering process, short for Psycho-acoustically
Optimized Wordlength Reduction, which can produce lower-bit files that sound indistinguishable
from higher-bit source files. When this option is turned on, SONAR uses dithering when you export a
higher-bit file at a lower resolution, or lower the bit depth of a project’s audio files by using the
Utilities > Change Audio Format command, or when you “render” audio (bounce, freeze, or apply
effects).
SONAR Producer offers five kinds of dithering:
• Rectangular. Essentially white noise, no noise shaping. Advantages: least CPU-intensive,
lowest signal-to-noise ratio, preferable to shaped dither when successive dithering can occur
(e.g. bouncing, freezing). Disadvantages: suffers from intermodulation distortion, higher
perceived loudness than Pow-r dither.
• Triangular. Higher level than rectangular, no noise shaping. Advantages: low CPU-intensive
dither, superior to Rectangular as it does not suffer from modulation noise effects. Preferable
to shaped (Pow-r) dither when successive dithering can occur (e.g. bouncing, freezing).
Disadvantages: higher perceived loudness than Pow-r dither.
Note: OMF files save the following:
• Tracks
• Clip positions
• Slip edits
• Fades and crossfades (as destructive edits)
• The following information is discarded:
• Volume
• Pan
• Automation
• Effects