Shift Pitch

input file : source soundfile

output file : destination soundfile (when marked)
or result.wav (for unregistered files)

processing mode : global

DART Pitch Shifter can be used to change the pitch of the recording without modifying its duration. The Shift pitch dialog allows you to fit the key of the music to your needs.

Setting Shift Pitch controls

Pitch changes can be controlled in three different ways.

The slider and the associated box can be used to define the new pitch as a percentage of the old one.

The two boxes situated in the Pitch variation group allow you to express the desired pitch variation in musical measures: semitones and cents. The upper box can be used to set the number of semitones (half-steps) by which the original pitch will be raised or lowered. The range is limited to +/-12 semitones, which is equivalent to one octave up or down. To fine tune above and below a semitone use the lower box, scaled in cents (+/-50). One hundred cents is equivalent to one semitone.

The Precision coefficient allows you to trade off between the quality of pitch modification and the speed of processing. Since the results are pretty insensitive to the simplifications introduced to achieve faster processing, in most cases you can safely set the Precision coefficient to 10% without causing a noticeable degradation of the produced sound.

Setting audition controls

Audition controls allow you listen to the results of DART Pitch Shifter while you change the Pitch Shifter controls. You can compare the results of Pitch Shifter to the original recording by switching between Play Result and Play Source. Choices in the Range control allow you to select starting and ending points in the soundfile that you are auditioning.

Press the Play Result button to hear the results of Pitch Shifter digital audio processing. You can modify the Pitch Shifter parameters while playing results. The green Ready light indicates the Pitch Shifter parameters you set have been processed and are ready to play. When you change parameters, the light goes off until your new settings have been processed.

Press the Play Source button to hear the original soundfile. All Pitch Shifter processing is bypassed.

Use the Overview Bar to set the position of the cursor. The Overview Bar is the unlabelled gray rectangle at the very top of the Pitch Shifter panel. A yellow vertical line in the box represents the cursor position.

Selections in the range box allow you to choose the start and end points of the soundfile you are auditioning (from cursor, entire file, local, block). With all choices, Pitch Shifter plays in a loop, jumping to the start point you choose when the end point is reached. Please note: setting parameters modifies the complete soundfile not just the portion you audition.