SOLIPSIUMAlpha
SOLIPSIUM Super-resolution audio engine
Video audio enhancer
Drop a video and Solipsium checks its sound, names what is wrong and repairs 20 seconds for you to hear.
Drop a video here
Solipsium checks its sound in your browser, without uploading the video. It can then repair 20 seconds of the sound for you to hear, with no account.
MP4, MOV, MKV or WebM, up to five minutes for the check.
Solipsium can still try a repair on 20 seconds.
Drop the same file in the editor with a free account.
What it is
Solipsium repairs noisy or damaged recordings. That includes the sound of a video, and a video export keeps the original picture with your repaired sound.
When your browser can open the video, the check names background noise, mains hum, clipping, dropouts and muffled sound. It gives the time of each, and the video is not uploaded for it.
This page writes those 20 seconds as a WAV file and sends them without the picture. The repair comes back as sound alone, to play against the original.
With a free account, you watch the picture in sync while the editor repairs the sound. The export keeps the original picture with the repaired track as AAC, in MP4 or MKV.
How it is repaired
Solipsium repairs a video's sound as it repairs any recording: dropouts, clipping and hum first, then at most one cleanup.
A fan or a camera's own hiss can leave a steady floor under the voice. When that floor is within 26 dB of the voice, Solipsium runs Full-band speech cleanup. The try lists the reason: “A steady noise floor was found, so it is removed.”
Lights and power supplies can put mains hum under a voice. Solipsium notches out the hum at 50 or 60 Hz and its harmonics, in bands a few hertz wide.
Echo reduction works through a long video about 20 seconds at a time. The page on removing echo from a video says when it stays off.
Questions
No. A video export keeps the original picture with your repaired soundtrack, and leaves out any other audio tracks and subtitles.
In the editor, with a free account, Rebalance turns down everything but the voice. In an October 5 test, the music usually went down by less than the setting asked. The free try is built for speech and has no step that separates music from a voice.
The check reads videos your browser can open, up to five minutes and 200 MB, and the try then sends 20 seconds of their sound. A longer video, or one your browser cannot open, has to be sent whole, so the try is offered for it only up to 25 MB. The editor takes videos up to 1 GB and 30 minutes.
Not for the check, which runs in your browser. Pressing Repair the first 20 seconds sends those 20 seconds of sound as a WAV file. If your browser could not open the video, or it runs over five minutes, the whole file, picture included, goes to Solipsium's server instead, up to 25 MB. Solipsium keeps only those 20 seconds of sound and deletes them within an hour. If you are signed in, a video you drop or choose is uploaded to your account and opens in the editor instead. The privacy notice has the rest.
Free audio tools
Each of these does one job on a video's sound.
Noise, hum and clipping in a video's sound.
When a room's echo is reduced, and when it is not.
Save a video's sound as an MP3 or WAV.
Make a quiet video louder, with its picture kept.
Every free tool on one page.
The editor repairs the sound of the whole video, up to 30 minutes at a time, and exports it with the original picture.
Free for a limited time, whole recordings included. No card.
Free account, no card.