StudioWavePro — Online Audio Editor with 48+ Studio Tools

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Stereo Balance moves the perceived center of a stereo file: one slider from full left to full right, with "Centered" in the middle and a live readout of the shift as a percentage. It uses an equal-power pan law — the same curve mixing consoles use — so the overall loudness stays constant as you sweep; the image moves without the track getting quieter in the middle or louder at the edges.

The everyday use is repair: recordings where one mic was hotter than the other, interviews that lean to one ear, captures from a device with a mismatched channel. A few percent of correction re-centers them. The creative use is placement — deliberately seating a sound off to one side before layering it with something else.

When to use

Re-center a recording where one channel came out louder than the other.
Fix an interview or podcast that sits annoyingly in one ear.
Correct lopsided audio from a camera or recorder with mismatched inputs.
Deliberately place a sound to one side for layering or creative effect.
Compensate for a source that was recorded slightly off-axis.

How to use

Click "Open Stereo Balance" below to launch the editor.
Drop in a stereo audio file — MP3, WAV, OGG, M4A and FLAC are all supported.
Press "Play preview" and drag the balance slider; the readout shows the shift (e.g. "20% left") and the loudness stays constant as you move.
Stop when the image sits where it should — for repair work, when voices feel centered in headphones.
Click Apply, then download as WAV or MP3.

Tips

Judge balance on headphones — room acoustics and speaker placement can mask a lopsided image that headphones reveal instantly.
For repair, small moves are typical: most lopsided recordings need 5–20% of correction, not a hard pan.
This tool shifts the whole mix. If one channel is broken or silent rather than just quiet, the Channel Extractor (take the good channel) or Mono Converter is the better fix.
Balance vs width: Balance moves the image left/right; the Stereo Widener makes it wider/narrower. They’re complementary, and both preview live.
The tool needs a stereo file — for mono audio there is no left/right to balance, and the panel will tell you so.

Frequently asked questions

How do I fix audio that is louder in one ear?: Open Stereo Balance, press Play preview on headphones, and drag the slider toward the quiet side until the image centers — usually a 5–20% move. Apply and download. That’s the entire repair.
Why does the volume stay the same when I pan?: The tool uses an equal-power pan law: as one channel gains, the other falls along matched curves that keep the combined acoustic power constant. It is the same law mixing consoles use, and it is why the sweep sounds smooth instead of dipping in the middle.
What’s the difference between balance and panning?: In a DAW, panning places a single source in the stereo field; balance adjusts the relative level of an already-stereo signal’s two channels. For a finished file they achieve the same audible result — shifting the image — which is what this tool does.
One channel of my recording is completely dead — can this fix it?: Balance can’t resurrect a silent channel; it would just turn the working one down. Instead, use the Channel Extractor to pull the good channel, which gives you a clean mono file — and optionally re-export that as your new master.
Why is the tool disabled for my file?: The file is mono — one channel has no left/right balance to adjust. If you need a mono file placed off-center inside a stereo field, that is a mixing operation: import the file into a stereo project in a DAW or video editor and pan it there.
Does shifting balance lose audio quality?: No — it is a pure per-sample gain change on each channel at full floating-point precision, with no filtering or re-encoding. Export as WAV for a lossless result.

StudioWavePro is a complete audio editor with 48+ studio-grade tools in one workspace. Trim, master, EQ, time-stretch, denoise, remove vocals, detect BPM and musical key, generate metronomes, and more. Editing tools

Audio Trimmer — crop a track to a selected region

Mute Section — silence a selected region

Reverse Audio — play the track backwards

Fade In/Out — ramp volume at start or end

Silence Trimmer — strip leading and trailing silence

Silence Gap Inserter — insert silence at a chosen position

Audio Looper — repeat a section N times

Audio Splitter — cut a track into multiple parts

Audio Merger — join multiple files end-to-end

Silence Splitter — auto-split at silent gaps

Crossfade Joiner — join clips with overlapping fades

Time and pitch

Speed Changer — speed up or slow down (with optional pitch preservation)

Pitch Shift — change pitch without changing tempo

Tempo Detector — estimate the BPM of a music track

Key Detector — estimate the musical key

Metronome Generator — create a click track at any BPM

Effects

Volume — make a track louder or quieter

Bass Boost — lift the low end

Treble Boost — lift the high end

Low Pass Filter — cut off high frequencies

High Pass Filter — cut off low frequencies (remove rumble)

Equalizer (3-band) — low / mid / high tonal shaping

Equalizer (10-band) — fine-grained tonal control

Echo — add repeating echoes / delay

Distortion — overdrive, fuzz, and lo-fi grit

Stereo Balance — shift the L/R center of a stereo mix

Stereo Widener — make stereo narrower or wider

Vocal Remover — karaoke (center-channel removal)

Hum Remover — strip 50/60 Hz mains hum

Mastering and analysis

Normalize — maximize volume without clipping

Compressor — even out loud and quiet parts

Loudness Meter — measure peak, RMS, and LUFS

Mono Converter — collapse stereo to mono

Channel Extractor — pull L, R, Mid, or Side

Sample Rate Converter — resample to 44.1, 48, or 96 kHz

Polarity Inverter — flip waveform for phase alignment

DC Offset Remover — center waveform around zero

Audio Visualizer — render an animated video from audio

StudioWavePro supports MP3, WAV, OGG, M4A, and FLAC files. Exports include WAV and MP3. This app requires JavaScript to run. Please enable JavaScript in your browser.