AudioRetoucher is a music transposition tool that changes the pitch and tempo of a sound track in real time. With AudioRetoucher the sound of an instrument or voice might be modified slightly, to make a vocalist or instrumentalist's job easier in dealing with difficult keys, and usually involves no more than a half-step (semitone) or possibly whole step (whole tone) change. Vocal pitch may also be speeded up to "smooth out" a performance, or to make the singer sound younger. It may be used for special effects like famous Chipmunks recordings were created by recording vocal tracks at a slow speed, then boosting them to normal at playback. AudioRetoucher mainly used by musicians as MP3 key shifter, but it also can detect BPM values for MP3 files and adjust the tempo in real time.

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Real time processing

AudioRetoucher uses state-of-the-art ultra-transparent algorithms to perform real-time sound processing, so you can adjust the tempo and pitch directly during playback. This allows you to fine-tune the sound settings before saving the file.

Key shifting

AudioRetoucher provides a crisp pitch-shifting, allowing you to change the pitch of your song from -12 to +12 semitones without audible artifacts. At the same time, the tempo and spatial image of the music remain unchanged. Singers can change the key of backing track to match the voice. This feature can also be useful for DJs to create seamless harmonic mixes.

Time stretching

AudioRetoucher allows you to automatically detect the tempo of a song and adapt it to your needs. The song key can be left unchanged or changed in sync with the tempo. DJs can use AudioRetoucher to make the music tempo suitable for the dancing and create playlists with beatmatching.


Sometimes you may need to change the playback speed slightly. For example, when the audio track is out of sync with the video, or when you change the video format between 24fps and 25fps. You can change the playback speed to an accuracy of one tenth of a percent. Similarly, with AudioRetoucher you can permanently speed up a song in iTunes.

Bass and Treble

After changing the tempo and pitch, you may need to adjust the timbre of the sound. For this purpose, the program provides for the possibility of changing the bass and treble.

Karaoke MP3+G support

If you have a CDG file for your audio track, then the graphic part of the song will be adjusted, so the lyrics of the song will be synchronized with the music after changing the tempo and speed.

Voice effects

By changing the sound settings you can get funny voice effects. Do you remember how your voice sounded after helium? Want to make your voice sound younger? You can get similar effects in seconds.

Popular audio formats

The program supports most popular audio formats, such as MP3, M4A, FLAC, WAV, AIFF. After processing, the files are saved in MP3 or WAV format.

Keeps audio tags

After processing, the tags will be copied to the output file. If necessary, the tags will be converted to the desired format. Do not worry about the Cover Art or the Lyrics - everything will remain in place.


Supported OS Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
Input audio formats MP3, MP2, M4A, FLAC, OGG, AIFF, WAV, WMA, AAC, APE
Output audio formats MP3, WAV, FLAC, M4A