Audio Phase Inverter
Invert the phase of audio by flipping the waveform polarity. Useful for fixing phase cancellation issues, creating vocal isolations by combining with the original, and audio engineering tasks.
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What is Audio Phase Inverter Online?
The Audio Phase Inverter flips the polarity of your audio waveform by multiplying every sample by -1. While this produces no audible difference when played alone, it is essential for fixing phase cancellation issues, creating vocal isolations, and advanced audio engineering tasks. Processing happens entirely in your browser.
How does Audio Phase Inverter Online work?
This tool inverts every sample in the audio buffer by negating its value. Positive samples become negative and vice versa. The result sounds identical in isolation but behaves differently when combined with other audio signals, making it a fundamental audio engineering tool.
Key Features
- Instant phase inversion with no quality loss
- Preserves all audio characteristics except polarity
- Works with mono and stereo files
- Supports all major audio formats
- Browser-based with no uploads
- Free to use with no sign-up
Common Use Cases
Phase Cancellation Correction
When two microphones capture the same source from different distances, one signal may be out of phase. Inverting one signal corrects the cancellation and restores full frequency response.
Vocal Isolation Technique
By inverting an instrumental track and combining it with the full mix, matching frequencies cancel out, leaving an approximation of the isolated vocals. This works best when the instrumental is an exact match.
Audio Engineering and Mixing
Phase alignment is critical in multi-microphone setups. Inverting phase on bottom snare mics, room mics, or DI signals is standard practice in professional mixing.
Testing and Verification
Combine original and phase-inverted copies to verify they cancel perfectly. Any residual audio indicates processing differences, which is useful for quality testing.
How to Use This Tool
Upload Your Audio
Drag and drop or click to upload the audio file you want to invert.
Click Invert Phase
The tool inverts the polarity of every sample in the file instantly.
Download the Result
Download the phase-inverted file and use it in your audio project or DAW.
Pro Tips
- 1
Phase inversion sounds identical when played alone - the difference only matters when combining with other signals
- 2
To test if two signals are out of phase, invert one and play them together - if they cancel, they were in phase
- 3
Phase inversion is lossless and reversible - inverting twice returns the original signal exactly
- 4
When recording with multiple microphones, always check phase alignment before mixing
Frequently Asked Questions
Will phase inversion change how my audio sounds?
No. A phase-inverted file sounds identical when played on its own. The difference only appears when the inverted signal is combined with other audio, such as in a multi-track mix or when summed with the original.
Is phase inversion the same as reversing audio?
No. Reversing plays the audio backwards in time. Phase inversion flips the waveform vertically - positive values become negative and vice versa - while keeping the timing unchanged.
Can I undo phase inversion?
Yes. Inverting the phase again returns the audio to its original state. The operation is perfectly reversible with no quality loss.
Does this upload my files?
No. All processing runs locally in your browser. Your files never leave your device.