Shahi Tempo Changer

SHAHI MUSIC TOOL

Change tempo. Separate vocals. Prepare clean originals.

Speed up or slow down audio and video, preserve vocal pitch, keep video synchronized, and use local AI to separate vocals from the music for media you own or are authorized to use.

🔒 Local processing

Choose a file

⇧

Drop audio or video here or click to browse MP3, WAV, M4A, AAC, FLAC, OGG, MP4, MOV, MKV, WebM and more

Tempo controls

Original BPM

Target BPM

Tempo 100%

New duration —

50%100%150%200%

Preserve vocal pitch Change tempo without making voices higher or lower.

Keep video synchronized Video duration follows the new audio tempo.

Load a file to preview.

AI vocal separation

AI • Local

Separate vocals from all music Creates two independent WAV stems: Vocals and Music / Instrumental. HTDemucs runs in your browser; your song is not uploaded by this app.

Engine not loaded First separation downloads an AI model of about 172 MB. WebGPU is used when available; otherwise it falls back to WebAssembly.

Output

Best results Use a clean stereo master. Separation quality depends on the original mix; reverb and tightly layered instruments can leave small artifacts.

Process & export

Original / authorized media only This app improves export quality and workflow. It does not bypass copyright, fingerprinting, or platform recording-match systems.

I own this recording or have permission to process and upload it.

Normalize loudness Balance loudness for a cleaner, more consistent upload-ready file.

Target loudness Audio sample rate

Export format Audio quality

Pitch LockUses tempo processing to keep vocals near the original key.

Video SyncVideo timing is adjusted to match the new audio duration.

PrivacyYour media is processed in your browser, not uploaded by this app.