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Audio Pitch & BPM Shifter

Transpose musical keys in semitones, time-stretch tempo from 50% to 200%, inspect live stereo frequencies, and download master-quality WAV files.

Drag & Drop Audio Track or Click to Browse
Supports MP3, WAV, FLAC, OGG, AAC • 100% Client-Side Processing
No Track Loaded
00:00 / 00:00
Pitch Transpose 0 st (0¢)
Tempo / Speed 100% (1.00x)

Mastering Audio Pitch Transposing and Harmonic Mixing

Pitch shifting and time-stretching are essential tools for DJs, electronic music producers, vocalists, and remixers. When preparing tracks for harmonic DJ sets or sample chopping, matching the musical root key and BPM without introducing metallic phasing artifacts is paramount.

🎹 Semitone Intervals & Key Shifts

Every semitone (+1 or -1 st) steps up or down by one half-step on the piano roll. Shifting by +7 semitones transposes to the musical perfect fifth (e.g. C minor to G minor), while +12 semitones jumps a complete octave.

⏱️ Pure Time-Stretching

Altering speed without altering pitch enables vocal acapellas or drum breaks to seamlessly lock into 128 BPM house or 150 BPM hard techno rhythms without turning vocals into high-pitched chipmunks.

🔒 Lossless Client-Side WAV Processing

Unlike online services that re-encode your music through lossy server pipelines, this tool computes audio buffers directly in your browser's RAM, rendering pure 32-bit float audio to 16-bit uncompressed WAV.

Frequently Asked Questions

What is the difference between semitones and cents?
One semitone equals exactly 100 cents. A semitone represents one physical fret on a guitar or one key on a piano. Cents allow micro-tuning when an instrument is slightly flat or sharp.
Does this tool support long DJ sets or full songs?
Yes! You can load songs of any typical length (3 to 10 minutes). Modern browsers can comfortably allocate the required RAM for full tracks.