SOLIPSIUMAlpha
SOLIPSIUM Super resolution audio engine
Meeting recordings
Find the file your meeting app saved and drop it here. Solipsium measures its noise, hum and clipping before it changes anything, and names what it found.
Drop a meeting recording here
Solipsium checks it in your browser for clipping, hum and noise, without uploading it. It can then repair the first 20 seconds for you to hear, with no account.
MP4, M4A, WebM, WAV, MP3 and more, up to five minutes for the check.
After signing up, drop the same file into the editor to repair all of it.
Then drop the same file into the editor. Scans and short repairs are free.
Finding the file
Download the recording to this device first, then choose it here.
A recording made on your computer goes to a Zoom folder in Documents: C:\Users\[Username]\Documents\Zoom on Windows, /Users/[Username]/Documents/Zoom on a Mac. In the Zoom app, open Settings, then Recording, and click Open beside the storage location. The video is saved as video followed by a number, ending .mp4, and the sound alone as audio followed by a number, ending .m4a.
A meeting's recording is saved in the organizer's OneDrive, in a folder named Recordings. A channel meeting's recording goes to the team's SharePoint site, under Documents, then Recordings. The organizer and co-organizers can edit and share it, so ask one of them for the file.
A recording is saved in the organizer's Google Drive, in the Google Meet folder, with a folder for each meeting. Older recordings sit in Legacy Meet Recordings, inside the same folder. In Drive, select the file, click More, then Download.
From Zoom's Managing computer recordings and Understanding recording file formats, Microsoft's Teams recording storage and Google's Record a video meeting, read October 23, 2026.
Fault by fault
The check in your browser names background noise, mains hum, clipping and dropouts, and says when it hears each one. The try repairs the first 20 seconds on Solipsium's server and lists a reason for each step. Solipsium's free try is built for speech.
A laptop fan or an air conditioner leaves a steady noise floor. When it sits within 26 dB of the voice, Full-band speech cleanup lowers it, and the result reads: “A steady noise floor was found, so it is removed.”
Other voices behind the speaker get the same cleanup, a speech model that keeps the voice's full range and lowers what surrounds it.
A laptop charging from the mains can add hum. When the lines at 50 or 60 Hz and its multiples stand 10 dB over the frequencies around them, they are notched out in bands 3 Hz wide: “Mains hum was found, so it is notched out before any cleanup.”
A microphone set too hot flattens the loudest words. Flat tops up to 10 ms long are partly raised back from the undamaged samples around them, never more than 2.3 dB over the clip level. A top that is unsafe to raise is left exactly as it was.
Questions
Either works. The check reads the sound of an MP4 video when your browser can open it. For a meeting longer than five minutes, drop Zoom's audio-only M4A: the try sends a file of up to 30 minutes and 25 MB whole, and the sound alone is much smaller than the video.
Only holes of exact digital silence are filled, up to 100 ms each, by continuing the voice's pitch from each side: “Short holes of lost audio were found, so they are filled from nearby sound.” A robotic or warbling voice has no silent hole, so the gap filler leaves it.
When the try finds other voices behind the speaker, the result reads: “Other voices seem to sit behind the speaker, so speech cleanup is used.” Switch between Original and Repaired on the same words to hear how far they came down before you keep it.
Microsoft puts a one-hour Teams recording at 400 MB. The check reads five minutes, and the editor imports up to 30 minutes and 1 GB at a time, so split the sound into parts with the audio splitter and import each part with a free account. A video of 30 minutes or less can go straight into the editor, and its export keeps the original picture with the repaired sound as AAC in MP4 or MKV.
Echo reduction runs only when echo is the one thing found, with no steady noise, music, hum or clipping. Then the result reads: “Room echo seems to blur the speech, so echo reduction is used.” When the recording also has steady noise, the noise cleanup runs and echo reduction does not.
Not for the check, which runs in your browser. Pressing Repair the first 20 seconds sends those 20 seconds; when your browser could not open the file, or it runs over five minutes, the file itself goes to Solipsium's server, so the try is offered for it only up to 25 MB. Solipsium keeps only the first 20 seconds and deletes them within an hour. If you are signed in, a file you drop or choose is uploaded to your account and opens in the editor instead. Keep your own originals and upload only media you have permission to process. The privacy notice has the rest.
Free audio tools
For the sound of a video, and for recordings too long to check in one go.
Save the sound of a meeting video as an MP3 or a WAV in your browser.
Cut a long recording into parts in your browser.
Hum, clipped peaks and room noise in a podcast track, measured before anything changes.
Check any recording for noise and hum, then hear its first 20 seconds repaired.
Chatter behind the speaker, lowered by speech cleanup.
Every free tool on one page.
Make a free account and drop the same file into the editor to repair all of it.
Free account, no card.