Change Music Frequency Online — Free Audio Frequency Changer
Use this free online tool to change the frequency of a music file without affecting its playback speed — upload your audio, select a target frequency, and download the re-tuned result in seconds.
What is audio frequency in music?
In music, frequency refers to the pitch of a sound, measured in Hertz (Hz). The standard modern tuning places the note A4 at 440 Hz, which has been the international standard since 1939. Changing the frequency shifts all pitches up or down by a fixed offset — for example, tuning an entire track from 440 Hz down to 432 Hz lowers every note slightly while keeping the tempo and duration exactly the same.
This is different from changing pitch via speed: a traditional pitch shift achieved by slowing tape would also alter the tempo. Modern frequency-shifting algorithms use time-stretching techniques to separate pitch from speed, so the music sounds re-tuned but plays at its original pace.
Common uses for audio frequency changing
- Instrument practice: Re-tune a backing track to match an instrument that cannot easily be re-tuned (e.g. a fixed-pitch flute or keyboard).
- Music transcription: Shifting a recording to a comfortable key can make it easier to identify and notate individual notes by ear.
- Exploring alternative tunings: Some listeners prefer music at 432 Hz or other reference pitches for personal or aesthetic reasons. Note that any wellbeing or health benefits associated with specific frequencies are anecdotal and not scientifically proven.
- Audio production: Match the pitch reference of a session recording to a different studio standard before mixing.
- Learning songs: Align a tutorial or reference track to the exact tuning of your own guitar, piano, or other instrument.
Supported input formats
The tool accepts the most widely used audio formats, including MP3, WAV, FLAC, OGG, AAC, M4A, WMA, AIFF, OPUS, and more. The output is delivered as a downloadable file once processing is complete. Registered users can opt in to receive an email notification when their conversion is ready.
Frequently asked questions
Will changing the frequency affect the speed or length of my audio file?
No. This tool shifts the pitch reference independently of playback speed. The duration and tempo of your file remain exactly the same after the frequency change.
What is the difference between 432 Hz and 440 Hz tuning?
440 Hz is the current international standard for concert pitch (note A4). 432 Hz is a slightly lower alternative preferred by some musicians and listeners for aesthetic reasons. Any claimed wellbeing or therapeutic differences between these tunings are anecdotal and not supported by scientific evidence.
Is this tool free to use?
Yes, the audio frequency changer is completely free. No subscription or credit card is required, though creating a free account lets you receive email notifications when large conversions are finished.
How are my uploaded files handled? Are they kept on your servers?
Uploaded files are processed solely to perform the frequency change and are deleted automatically afterwards. They are not stored permanently or shared with third parties.
Which audio formats can I upload?
You can upload common audio formats such as MP3, WAV, FLAC, OGG, AAC, M4A, WMA, AIFF, and OPUS, among others. The converted file can be downloaded directly once processing is complete.