Pitch

Menu Command: Effect | Pitch

Changes the pitch of the selection. This is useful for converting instrument samples from one note to another. The pitch can be changed by using a scale factor or by specifying semitone and fine tune values.

Scale
This option scales the pitch by a percentage. If you set the scale to 50, that will be equivalent to a downward shift by one octave. A value of 200 is the same as an upward shift of one octave and would make a voice sound like a chipmunk. A value of 75 would make a woman's voice sound like a man's.

Semitone
This option changes the pitch by semitones (notes). If your sound is a note at middle C and the semitone value is 2, the note will be changed to D. A value of -1 changes the note to B. A value of 12 make the note one octave above middle C. The Fine tune value lets you make a slight pitch adjustment in hundredths of a semitone. For example, a value of 50 would let you change a note from middle C to halfway between C and C#.

Preserve length
If this option is checked, a complex algorithm is used to keep the length of the original note the same as the new note. The tempo is preserved. In terms of a voice, this changes the pitch without speaking faster or slower. This option requires a substantial amount of processing time. In general, the FFT size should be set to 11 or 12 and the Overlap should be 4x for fastest processing. Values of 8x and 16x may give better results, but require much more processing time.

Higher quality pitch changes may be possible using the Time Warp effect. Try the "Similarity pitch up" or "Similarity pitch down" presets under the Tool | Effect Chain Editor.