Change Audio Pitch Online — Shift Pitch Up or Down in Semitones

What Is Pitch Shifting?

Pitch shifting is the process of raising or lowering the musical pitch of an audio recording without changing its playback speed or duration. This is different from simply playing audio faster or slower — the tempo stays constant while the pitch moves up or down. Modern pitch shifting algorithms use sophisticated time-stretching and frequency analysis to achieve natural-sounding results.

Musical Applications of Pitch Shifting

• Transposing songs — Move a song up or down to match a singer voice range without learning a new arrangement.
• Vocal harmonies — Create harmony parts by pitch-shifting a vocal recording up or down by thirds, fourths, or fifths.
• Practice tool — Transpose a backing track to a key more suitable for your practice range.
• Creative effects — Extreme pitch shifts create dramatic effects like chipmunk voices (high pitch) or monster voices (low pitch).
• Instrument retuning — Simulate what an instrument sounds like tuned to a different pitch without re-recording.

Understanding Semitones

A semitone is the smallest interval in Western music, equivalent to one piano key up or down. An octave contains 12 semitones. Common pitch shifts:

• +2 semitones — Raises the pitch by one whole step (e.g. C to D).
• +12 semitones — Raises the pitch by a full octave.
• -1 semitone — Lowers the pitch by a half step (e.g. A to G sharp).
• -12 semitones — Lowers the pitch by a full octave.

Audio Quality After Pitch Shifting

Small pitch shifts of 1 to 3 semitones generally sound natural and transparent. Larger shifts of 4 to 7 semitones become more noticeable and may introduce slight artefacts depending on the algorithm. Extreme shifts of 8 or more semitones will sound deliberately altered. Voice recordings tend to show pitch shift artefacts more noticeably than music.

Pitch Change vs Speed Change

This tool changes pitch without affecting speed. To change speed without affecting pitch, use our Speed Changer tool. To change both together (like playing a record at a different RPM), use the Speed Changer which also shifts pitch proportionally.