Adobe AUDITION 3 User Manual page 177

Pitch Shifter options
Contains options that adjust pitch:
Pitch Transpose
• Transposes pitch in semi-tone increments, which equal musical half-notes (for example, the note C#
Semi-Tones
is one semi-tone higher than C). A setting of 0 reflects the original pitch; +12 semi-tones is an octave higher; -12
semi-tones is an octave lower.
• Adjusts pitch in fractions of semi-tones. Possible values range from -100 (one semi-tone lower) to +100
Cents
(one semi-tone higher).
• Determines the relationship between shifted and original frequency. Possible values range from 0.5 (an
Ratio
octave lower) to 2.0 (an octave higher).
Determines sound quality, with the High setting taking longest to process. Use the Low setting for 8-bit or
Precision
low-quality audio, and use the High setting for professionally recorded audio.
To quickly determine which Precision setting to use, process a small selected range at each setting until you find the
best balance of quality and processing time.
Control how audio is processed:
Pitch Settings
•
Determines the size of each chunk of audio data. (The Pitch Shifter effect divides audio into
Splicing Frequency
very small chunks for processing.) The higher the value, the more precise the placement of stretched audio over time.
However, artifacts become more noticeable as values go up. At higher Precision settings, a lower Splicing Frequency
may add stutter or echo. If the frequency is too high, sound becomes tinny and voices have a tunnel-like quality.
•
Determines how much each chunk of audio data overlaps with the previous and next ones. If
Overlapping
stretching produces a chorus effect, lower the Overlapping percentage. If doing so produces a choppy sound, adjust
the percentage to strike a balance between choppiness and chorusing. Values range from 0 to 50%.
•
Use Appropriate Default Settings
Stretch effect (Edit View only)
The Time And Pitch > Stretch effect lets you change the pitch of an audio signal, the tempo, or both. For example,
you can use the effect to transpose a song to a higher key without changing the tempo, or you can use it to slow down
a passage without changing the pitch. You can also vary pitch and tempo over time.
See also
"About process effects" on page 104
"Apply individual effects in Edit View" on page 107
"Use effect presets" on page 104
Stretch options
Constant Stretch or Gliding Stretch
stretch on the selection, or a gliding stretch, which varies the amount of stretch from an initial percentage to a final
percentage.
Stretch %, Initial %, Final %
In Constant Stretch mode, you set a fixed Stretch percentage. In Gliding Stretch mode, you set Initial and Final
percentages to stretch the waveform in a linear fashion from one ratio to another. Changes in the sliders are reflected
in the Ratio and Length boxes.
Applies good default values for Splicing Frequency and Overlapping.
Performs either a constant stretch, in which there is no change in the amount of
Sets the amount of stretch applied to the waveform (less than 100% shrinks the wave).
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