Isolate Voice from Audio Online — Free
Enhance and extract vocals using mid/side processing and voice-band EQ. Works entirely in your browser — no upload, no AI server required.
Drop audio file here or click to browse
Stereo MP3, WAV, or OGG works best
How Browser-Based Voice Isolation Works
Professional vocal isolation using AI (like Demucs or Spleeter) requires significant computing power and usually runs on a server. This tool takes a different approach that works entirely in your browser using two classical signal-processing techniques:
- Mid/Side (M/S) Processing: In a stereo mix, the vocal track is almost always panned to the center (the "mid" channel). Instruments and ambience tend to be panned to the sides. By extracting the mid channel (Left + Right) and attenuating the side channel (Left − Right), the tool emphasizes the center-panned vocal while reducing stereo-spread instrumentation.
- Voice-Band EQ Filtering: Human speech fundamentals fall between roughly 85 Hz and 3 kHz, with most energy between 200 Hz and 4 kHz. A bandpass filter centered on this range boosts the vocal frequencies while cutting low-end rumble and high-frequency instrumentation.
These techniques work best on stereo commercial recordings with conventionally mixed vocals. Results will vary depending on the production style of the track.
Practical Use Cases
- Create a karaoke backing track by inverting the side signal (instrument isolation)
- Enhance speech clarity in a mixed recording
- Prepare vocals for transcription or analysis
- Experiment with vocal separation as a starting point for further editing in a DAW
Frequently Asked Questions
Will this completely remove background music?
Not completely. M/S processing and EQ are effective signal-processing techniques but they are not AI stem separators. You will get a reduced instrumental background with enhanced vocals. For professional results, tools like Demucs or RipX run AI models on a server or locally with significant compute.
Does this work on mono audio files?
Mid/side separation requires stereo input. For mono files, only the voice-band EQ is applied. This can still improve speech clarity by cutting low-end rumble and extreme high frequencies.
What type of music works best?
Pop and rock tracks with conventionally center-panned lead vocals work best. Heavily layered music, mono recordings, or tracks where instruments are also panned center will see less separation.
Are my files uploaded to a server?
No. All processing happens locally in your browser. Your audio files never leave your device.