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YOUR STEMS ARE READY

Change the Tempo or Key
After VRII

VRII separates the parts you want to hear. These two Song Surgeon tools let you take the next step: slow a track down, speed it up, or move it into a more comfortable key.

Tempo Key / Pitch Preview & Export

CHOOSE THE TOOL THAT FITS

Quick online change or a complete desktop workspace?

Both options can change key/pitch and tempo independently. Your best choice depends on where you are working and how much control you need.

01 ONLINE · ANY DEVICE

Online Key, Pitch & Tempo Changer

Best for a quick change on a phone, tablet, Mac, or Windows computer.

  • Works directly in your browser—nothing to install.
  • Detects the key and tempo of your uploaded audio.
  • Changes pitch by semitones or fine-tunes it by cents.
  • Adjusts tempo separately and lets you preview before processing.
  • New users can process five files during the free trial.
Open the Online Tool
Pitch and tempo controls in the Song Surgeon online tool
Adjust key/pitch and tempo independently in the browser.
02 DESKTOP · WINDOWS + MAC

Song Surgeon 6

Best for regular practice, detailed listening, and deeper audio work.

  • Changes key/pitch and tempo with high-quality audio algorithms.
  • Adds looping, speed training, chord, key and BPM detection, editing, and export.
  • Runs locally on Windows and macOS, so it is ready for repeat use.
  • VRII is available inside Song Surgeon 6 Pro as an integrated add-on.
  • The fully functional Pro demo includes four hours of use.
Try it with confidence: purchases include a 60-day, 100% money-back guarantee.
Download Free Demo Explore Song Surgeon 6
Song Surgeon 6 desktop software box
A complete musician’s audio workspace for Windows and Mac.

A SIMPLE RULE

Choose in ten seconds

On Android, iPhone, iPad, Chromebook, or a shared computer, use the online tool. If you work with music often and want looping, analysis, editing, and VRII in one application, try Song Surgeon 6.

I need one quick adjustment

Use the online tool from any modern browser.

I practice or edit regularly

Use Song Surgeon 6 for a broader set of music tools.

FROM SEPARATION TO PRACTICE

Continue with any VRII result

  1. 1

    Save your VRII tracks

    Finish the separation and locate the isolated instrument, mix, or Basic group files.

  2. 2

    Open the track you need

    Upload it to the online tool or open it directly in Song Surgeon 6.

  3. 3

    Adjust, preview, and save

    Set tempo and key/pitch independently, listen to the result, then export your new file.

READY FOR THE NEXT STEP?

Start with the tool that matches your workflow.

Use Online Try Song Surgeon 6