User manual

249
Audio processing and functions
Pitch Shift
This function allows you to change the pitch of the audio
with or without affecting its length. You can also create
“harmonies” by specifying several pitches or apply pitch
shift based on a user specified envelope curve.
When the Transpose tab is selected, the dialog contains
the following parameters:
Keyboard display
This is a graphic overview of the transposition setting.
Here, you can specify the transpose interval in semitones.
• The root note is indicated in red.
This has nothing to do with the actual key or pitch of the original audio, it
just provides a way to display transpose intervals. You can change the
root note by using the settings in the Pitch Shift Base section, or by
pressing [Alt]/[Option] and clicking in the keyboard display.
• To specify a transpose interval, click on one of the keys.
The key is indicated in blue, and the program plays test tones in the base
pitch and transpose pitch to give you an audible confirmation.
• If “Multi Shift” is activated (see below), you can click on
several keys to create “chords”.
Clicking on a blue (activated) key removes it.
Pitch Shift settings
The “Semitones” and “Fine-Tune” settings allow you to
specify the amount of pitch shift. You can transpose the
audio ±16 semitones, and fine-tune it by ±200
cents
(hundredths of semitones).
Volume/Amplitude
Allows you to lower the volume of the pitch-shifted sound.
Multi Shift
When this is activated, you can add several transpose val-
ues, creating multi-part harmonies. This is done by adding
intervals in the keyboard display (see above). Note that
you cannot use the Preview function in Multi Shift mode.
• If the intervals you add make up a standard chord, this
chord is displayed to the right.
Note, however, that to include the base pitch (the original, untransposed
sound) in the processed result, you need to click the base key in the key
-
board display as well, so that it is displayed in blue.
Listen Key/Chord button
Clicking this button plays a test tone pitched according to
the activated interval key on the keyboard display. If “Multi
Shift” is activated, this button is called “Listen Chord” and
plays all activated intervals as a chord.
Pitch Shift Base
This allows you to set the root note (the red key in the key-
board display). It has nothing to do with the actual pitch,
but is an aid for setting up intervals and chords.
Algorithm Settings
This is where you can make settings for the MPEX 4
algorithm. For a description of the available presets, see
“About time stretch and pitch shift algorithms” on page
259.
For each quality setting you can choose between the reg-
ular setting and a setting where the formants are pre-
served. If you are processing vocal material, select the
Preserve Formant setting in order to preserve the vocal
characteristics of the pitch-shifted audio and to avoid a
“chipmunk voice” effect.
Time Correction
When this is activated, the pitch shift process will not affect
the length of the audio. When this is deactivated, raising the
pitch will shorten the audio section and vice versa, much
like changing the playback speed on a tape recorder.