What Is Pitch Shifting?
Pitch shifting allows you to change the pitch or key of audio without altering its tempo or duration. This means you can raise or lower the pitch of a vocal track, an instrument, or an entire song while keeping it at the exact same speed.
How to Change Pitch in Audacity
Step 1: Select Your Audio
Open your audio file in Audacity. Click and drag your mouse over the audio
track to select the portion you want to pitch shift. To select the entire
track, click the track header or press Ctrl + A (Windows/Linux) or
Cmd + A (Mac).
Step 2: Open Change Pitch
Navigate to the effects menu at the top of the screen. Look for Effect > Pitch and Tempo > Change Pitch... and click on it to open the effect dialog.
Step 3: Set Target Pitch
In the Change Pitch dialog box, choose your desired pitch. You can enter the new pitch by specifying a musical note, the number of semitones, or a precise percentage change.
Step 4: Apply
Click the Preview button to hear how the audio sounds. If you're satisfied with the result, click Apply to process the track.
Change Pitch Settings Explained
Pitch From / To (Musical Notes)
This setting allows you to specify the starting note and the target note. Audacity will automatically calculate the required pitch change. This is especially useful for musicians transposing a song into a different key.
Semitones
A semitone is the smallest musical interval in Western music (e.g., from C to C#). Entering a positive number (like 2) will raise the pitch by that many semitones, while a negative number (like -2) will lower it.
Percent Change
If you prefer adjusting the pitch mathematically, you can directly enter the percentage change. This is commonly used for sound design or voice modulation rather than traditional musical pitch shifting.
Use High Quality Stretching
Check this box for a more accurate algorithm that minimizes audio artifacts and preserves better audio quality, particularly for complex layers or large pitch modifications. It may take slightly longer to process.
Common Pitch Shifting Tasks
- Transposing Music: Change a backing track's key to match a singer's vocal range without slowing down the song.
- Voice Modification: Deepen a voice for a podcast or video, or raise it for a stylistic effect.
- Sound Design: Modify sound effects to fit different contexts in a video game or film.
Tips for Best Results
- Use the High Quality Stretching option for music, vocals, and any critical audio.
- Avoid shifting pitch too drastically (more than a few semitones), as it can introduce unnatural artifacts and "chipmunk" effects unless that is your intended sound.
- Always use the Preview feature before applying the effect to ensure it sounds right.
Frequently Asked Questions
Does changing pitch affect the speed?
No, using the "Change Pitch" effect alters the notes without changing the tempo.
If you want to change both pitch and speed simultaneously, use the "Change Speed"
effect instead.
Is the pitch shifter free?
Yes, Audacity is completely free open-source software, and all its built-in effects
are free to use without restrictions.
Download Audacity Free
Ready to start pitch shifting your audio? Download Audacity for free on Windows, macOS, or Linux.