StereoMonoizer finds the mono hiding inside your stereo files, then converts it to true mono — before it ever touches your DAW. Lighter sessions, fewer voices, cleaner panning, hours back.
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Bounces, stems and library sounds get exported as stereo files even when both channels are identical. That doubles your voice count, disk usage and CPU load — and quietly wrecks your panning. StereoMonoizer catches every one of them in seconds.
No menus to dig through. Drop your files, read the waveforms, convert. Done.
Throw a whole folder of stems onto the window and StereoMonoizer queues them instantly. No dialogs, no waiting.
Our signature display overlays stereo content on the waveform — blue for true stereo, grey for mono. You see the answer.
Analyze hundreds of files at once. StereoMonoizer sorts true stereo from mono automatically and files them into folders.
Trust the algorithm, or take the wheel. Flip any file's classification by hand when a creative call is yours to make.
Preview any file in place before you commit. Confirm the conversion sounds exactly the way it should.
Convert to true mono and set your target level in the same pass, so files land in the session ready to go.
Mono sounds on stereo tracks quietly double their plugin load. On a session that's maxing your CPU, half the tracks may actually be mono — convert them first and every plugin on them runs at 50% less CPU, freeing headroom to mix.
Every mono sound stuck in a stereo file burns two voices where one would do. On large sessions that inflated voice count causes CPU spikes and sluggish behaviour. Convert first and keep your voice count lean.
A mono file is 50% smaller than the stereo file of the same length. Especially on smaller, pricier SSDs, converting mono-in-stereo files meaningfully shrinks your active sessions and your archives.
A mono sound on a stereo track makes panning needlessly complex — in Pro Tools you're juggling two pan controls and coordinating their automation. Put mono on mono tracks and panning is one simple control again.
*"This little app could have saved me 3 hours in mix setup yesterday." — Craig Bauer, mixer for Kanye West
A mono track uses one voice, a set amount of disk space, and a set amount of CPU per plugin. A stereo file does all of that — twice. True stereo sounds (overheads, synths, strings, blended backing vocals) belong on stereo tracks; a mono sound trapped in a stereo file is pure wasted resources.
Repeat for every file — and hope you never misjudge one. On a big session that's an hour or more per song.
It analyzes every file, flags the mono-in-stereo ones, and converts them to true mono on a single click — so you skip straight to mixing.
Drag a folder of stems, bounces or library sounds straight onto StereoMonoizer.
Blue means true stereo, grey means mono-in-stereo. The whole batch is classified in seconds.
One click renders true mono files (optionally normalized), sorted into folders and ready to import.
StereoMonoizer has been finding mono-in-stereo files since 2015 — back when the idea got more eye-rolls than downloads. A decade later it's a studio staple, and a wave of AI-built copycats are still catching up to what the original does. Accept no imitations.
‘Time is money,’ the saying goes. It’s certainly true in the music creation world. My session prep times have been shaved off considerably. Being able to view the stereo content of an entire waveform at a glance makes this a must-have.
The best $49 you'll spend on audio software ever. This little app could have saved me 3 hours in mix setup yesterday and will save countless hours in the future. Genius — I wish I'd thought of it.
StereoMonoizer is awesome! In the blink of an eye it analyzes a file and determines if it's actually mono, then files it away neatly. This is a BIG time saver and a major DSP saver. A mix engineer's dream utility and a must-have for all Pro Tools users.
StereoMonoizer addresses importing stems and mix prep head on, saving me time and frustration from the very beginning of a mix. It's a no-brainer.
By automatically eliminating unnecessary stereo tracks and letting me normalize to the exact level I want, my session prep time is a fraction of what it used to be.
One click and the tracks are sorted, easy as can be. A great product that will save you money over the course of the year.
It analyzes audio files to detect whether they contain true stereo information or are simply mono content saved in a stereo container. It then converts the mono-in-stereo files to true mono — optionally normalized — so your sessions stay lean.
Every StereoMonoizer license is a one-time purchase — there's no subscription. Each license includes 2 activations, so you can run it on two of your machines.
Licensing is cloud-managed, so you're never locked out. If a machine crashes, gets wiped, or you just need to move your license to a new computer, open StereoMonoizer on any device, click License → Manage Activations, and deactivate the old machine to free up the seat instantly.
Want to try before you buy? You can claim one free 14-day trial license per account.
macOS and Windows 64-bit. A single $49 license covers the current release with free updates.
Yes. StereoMonoizer runs standalone and prepares files before import, so it works alongside Pro Tools, Logic, Ableton, Cubase, Studio One and any DAW that reads standard WAV/AIFF files.
No. It's a one-time $49 purchase. You own the license, and updates within the current version are free.
Absolutely — download the demo, read the manual and give it a try. When you're ready, buy a license to unlock unlimited conversions.
New features, workflow tips and the occasional discount. No spam — just the good stuff.
