Stereo widener
Pushes the sides of a stereo mix outward so it sounds bigger on headphones and speakers, while bass below 120 Hz stays anchored in the middle. Runs on your machine; saves as WAV or smaller.
Runs in your browser. Your file never leaves your computer.
- Width5 to 100, default 35
- Low endMono below 120 Hz, always solid
- Mono-safeModerate widths fold back cleanly
- LengthUnchanged to the sample
A narrow mix sounds like it lives between your eyebrows; a wide one wraps around you. Widening works by raising the side signal — the part of a stereo recording that differs between left and right — relative to the centre. Done carelessly it hollows out the middle and makes the bass wobbly, which is why this widener keeps everything below 120 Hz in mono: the kick and bass stay planted while the cymbals, pads and reverbs spread outward. The default width of 35 is a clear improvement that still folds back to mono safely; 100 is a special effect. It needs a genuinely stereo file — a mono recording has no sides to widen, and the option simply will not appear for one.
Questions
Why does the bass stay in the middle?
Low frequencies carry the mix's weight, and spreading them makes the track sound loose on speakers and can cancel badly in mono. Keeping everything below 120 Hz centred is standard mastering practice.
Can I widen a mono file?
No — width is the difference between the left and right channels, and a mono file has none. The widener only appears for genuinely stereo audio.
Will it sound wrong on a mono speaker?
At the default width, no; the centred content dominates when channels are summed. Extreme widths lose some energy in mono, which is the usual trade-off of the technique.
What happens to podcasts or voice?
Spoken voice usually sits dead centre, so widening changes it very little; it mostly lifts room tone and music beds. It is a tool for mixes, not for dialogue.
Can I hear it before saving?
Yes — the file plays through the widener while you move the width, and the Original switch flips back for an instant A/B. The export renders the same processing you tuned by ear.
Related conversions
- Audio equalizerA six-band EQ you play with: drag the curve, hear the change live, A/B against the original, then save as WAV or a smaller format. The file stays on your computer.
- Bass boosterA clean low-shelf lift below 90 Hz with a limiter guarding the peaks: fuller low end, no clipping. Starts gentle at +3 dB; drag the curve for more. Works on MP3, WAV, FLAC, M4A and OGG.
- WAV to MP3Turn a large studio recording into a small file that plays anywhere, at a bitrate where almost nobody can hear the difference.
- WAV to FLACFLAC keeps every sample of the recording and still cuts the file roughly in half. The archive format for audio you may need again.
- WAV to M4AAAC at 256 kbps: better sound per megabyte than MP3, native on every Apple device, fine everywhere else.
- WAV to OGGThe most efficient codec in wide use: transparent around 128 kbps, ideal for the web and for apps, weaker on Apple hardware.
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