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DigiRack Plug-ins Guide110
number you typed. This is especially useful for
post-production pull up and pull down factors
(see “Post Production Pull Up and Pull Down
Tasks” on page 112).
Formant
The Formant section of Time Shift lets you shift
the formant shape of the selected audio inde-
pendently of the fundamental frequency. This is
useful for achieving formant correct pitch shift-
ing. It can also be used as an effect. For example,
you can formant shift a male vocal up by five
semitones and it will take on the characteristics
of a female voice.
The Formant section is only available when
Monophonic is selected as the Audio Type. The
Formant section provides a single control for
transposing the formants of the selected audio
by –24.00 semitones (–2 octaves) to +24.00
semitones (+2 octaves), with fine resolution in
cents. Adjust the Formant Shift control or click
the Shift field and type the desired value.
Transient
The Transient section is only available when
Polyphonic or Rhythmic is selected as the Audio
Type, and provides slightly different controls for
each.
When Polyphonic is selected as the Audio Type,
the Transient section provides controls for set-
ting the transient detection threshold and for
adjusting the analysis window length for pro-
cessing audio.
Time Shift plug-in, Formant section
Audio with a fundamental pitch has an
overtone series, or set of higher harmonics.
The strength of these higher harmonics cre-
ates a formant shape, which is apparent if
viewed using a spectrum analyzer. The over-
tone series, or harmonics, have the same
spacing related to the pitch and have the
same general shape regardless of what the
fundamental pitch is. It is this formant
shape that gives the audio its overall char-
acteristic sound or timbre. When pitch
shifting audio, the formant shape is shifted
with the rest of the material, which can re-
sult in an unnatural sound. Keeping this
shape constant is critical to formant correct
pitch shifting and achieving a natural
sounding result.
Time Shift plug-in, Transient section with Polyphonic
selected as the Audio Type
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