Adobe AUDITION 3 User Manual page 255

Varies the quality level as needed to ensure that the bit rate stays at the specified rate. This method
Fixed Bitrate
makes a consistently sized file, although the quality may not be as high as with Variable Bit Rate encoding.
Enables the following options:
Use Advanced Settings
•
Minimum, Target, and Maximum Bitrate
• Specifies the amount of surplus bits to reserve during variable bitrate encoding.
Bit Reservoir Size
• Determines how surplus bits are distributed. Lower settings store surplus bits during consistent
Bit Reservoir Bias
audio, instead applying those bits to transient peaks and troughs. Higher settings store surplus bits during transients,
instead applying those bits to consistent audio. The default setting, 0.2, slightly favors transients.
• Sets the amplitude above which the encoder looks for artifacts in transient peaks. Lower
Impulse Noise Floor
noise floors improve transient response but increase bitrate.
• Determines how quickly bitrate returns to the targeted average. At lower settings, bitrate varies
Damping Time
less, but audio quality suffers; at higher settings, bitrate varies more, but audio quality improves.
• Specifies the highest frequency to retain in the encoded file.
Lowpass Filter
SampleVision (.smp)
The SampleVision format is native to the Turtle Beach SampleVision program. This format supports only mono,
16-bit audio. If a file is in a different format, Adobe Audition prompts you to convert it before saving it.
This format also supports loop points, which you can edit in the Marker List panel. The Label of the marker must be
Loop n, m
in the format where "n" is the loop number from 1 to 8, and "m" is the mode (0 = no looping, 1 = forward
loop, 2 = forward/back loop).
Spectral Bitmap Image (.bmp)
Though most applications store conventional images in BMP format, Adobe Audition can save and import audio in
this format. When you save audio as a bitmap image, Adobe Audition creates two image files: one reflects the spectral
frequency graph, the other stores data that correctly aligns phase when you reimport the graph. (The latter file
includes phase in the filename.) You can incorporate exported graphs into visual presentations, or modify them in
image-editing applications like Adobe Photoshop.
In an image-editing application, apply gradients to create audio fades, and adjust opacity to change audio amplitude.
To protect your work, apply visual watermarks above the audible frequency range.
For information about importing spectral graphs, as well as photographs, logos, and other visually-oriented files, see
"Import a bitmap image as audio" on page 44.
Windows Media Audio (.wma)
The WMA format utilizes a perceptual compression scheme and lets you select from three different encoding
options:
Constant Bit Rate Encoding
makes a consistently sized file, although the quality may not be as high as with Variable Bit Rate encoding.
Variable Bit Rate Encoding
audio passage being encoded. This method can maintain higher quality audio in the file, although the file size is not
as predictable as with Constant Bit Rate encoding.
Mathematically Lossless Encoding
Let you precisely specify compression settings.
Varies the quality level as needed to ensure that the bit rate stays the same. This method
Maintains the audio quality by varying the bit rate depending on the complexity of the
Compresses to a smaller file size than WAV, but results in no fidelity loss.
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