User Manual

Table Of Contents
WAVELAB
9 – 204 Off-line processing
Pitch Quantize
The purpose of this process is to automatically detect and correct the
pitch (intonation) of an audio file. The input signal is quantized to discrete
notes.
Pitch quantize works best on recordings that have a single fundamental
frequency, such as voice or single instruments. The dialog has the follow-
ing parameters:
Reference frequency: defines the reference tuning (in Hz) for the pitch
correction. Default is 440 Hz.
Tolerance: defines the tolerance for the pitch correction (in cents).
If the pitch of the input signal deviates more than the specified amount from the nearest
semitone, it is shifted toward that frequency by the specified amount. For example, if a
singer sings 25 cent flat and this value is set to 10, the correction will shift the note so it will
be 15 cent flat after the correction.
Slur time: defines the time it takes for the correction to reach the full cor-
rection amount.
Typically, sung notes are slightly unstable at the beginning, because the attack phase of a
sound has a higher amount of noise, and because singers gradually adjust their tuning after
the onset of the note. The slur time makes the pitch correction sound more natural because
it mimics this effect. Higher values will yield a slower adaptation time and will delay the cor-
rection to the corrected pitch. Longer slur times will also preserve vibrato better.