Shahi Tempo Changer

SHAHI MUSIC TOOL

Change tempo. Separate vocals. Create studio-clean, Shahi-branded vocals.

Speed up or slow down audio and video, preserve vocal pitch, separate vocals locally with AI, apply studio-style vocal cleanup, and create Shahi Music branded audio downloads for media you own or are authorized to use.

🔒 Local processing

Choose a file

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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.

Vocal CleanupApplied before the vocal WAV is created

Auto

Auto Trim Start / End SilenceSafely removes blank space before the first vocal and after the last vocal.

Remove Long Silent GapsOptional. Shortens long blank sections between vocal phrases.

Silence threshold Minimum internal gap

Start/end trimming preserves the song timeline between the first and last vocal. Removing internal gaps makes a compact vocal file and changes its timing relative to the instrumental.

Studio Vocal CleanEnhance the separated vocal before download

Studio preset Enhancement amount 65% Light ⟷ Strong

Residue reductionEQDe-esserCompressionPresencePeak control

Studio Vocal Clean improves an AI-separated stem but cannot reconstruct detail that is missing from the original mix. Severe reverb, bleed, or separation artifacts may still remain.

Shahi Music BrandingEmbed your Shahi Music image and metadata into downloadable MP3 files

Included

Embed Shahi Music cover artUses your Shahi Music image in branded MP3 downloads.

Add Shahi Music metadataWrites Artist, Album, Publisher and Comment tags automatically.

Shahi Music cover included MP3 exports can carry cover art and metadata. WAV downloads remain available as untouched studio-quality files.

Branded MP3 outputs are created for audio downloads. Video exports remain unchanged. If you switch branding off, the app still gives you WAV downloads.

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.