SOLIPSIUMAlpha
SOLIPSIUM Super resolution audio engine
Traffic
Drop a recording made by a road, on a street or with a window open. Solipsium measures the steady roar and the low rumble before it changes anything.
Drop a 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.
WAV, MP3, M4A, MP4 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.
What traffic leaves
A busy road makes a steady roar. A single car, a bus or a horn comes and goes.
A road that never stops is a steady floor. A steady floor within 26 dB of the voice gets Full-band speech cleanup, a speech model that keeps the voice's full range and lowers what surrounds it. The result reads: “A steady noise floor was found, so it is removed.”
The repair labels rumble when the band from 30 to 80 Hz stands 10 dB over the band from 150 to 400 Hz, is loud enough against the voice to be heard, and fills the band evenly. When no cleanup ran before it, the band under 300 Hz is turned down last: “Low rumble was found under the voice, so after every other step the steady noise below 300 Hz is turned down towards the recording's own quiet level, with one fixed curve for the whole recording; where the recording is much louder than the rumble at a frequency, that frequency keeps nearly all of its level.”
A sound that rises and falls in a few seconds is not steady, so the try leaves it. In the editor, a box on the spectrum can turn one down.
Recording
The quieter the street is on the recording, the less the repair has to take out of the voice.
The voice grows louder against the road with every step closer.
Stand so you are between the microphone and the traffic, or record on the side of a building away from it.
A passing truck pushes air as well as sound. A foam cover or a sleeve keeps the rush of it out of the microphone.
Questions
Only steady noise and steady rumble are measured and lowered by the try. A car that passes is a short, changing sound. In the editor, with a free account, mark it with a box on the spectrum and turn it down.
No. A siren rises and falls, so it is neither steady noise nor mains hum, and the try leaves it.
When a cleanup runs for the roar, the rumble step is skipped, because the cleanup lowers the low band too. The try lists which one ran beside the result.
Drop the video file. The check reads its sound when your browser can open it, and the editor's video export keeps the original picture with the repaired sound.
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. The privacy notice has the rest.
Free audio tools
For the low band and the wind.
Low rumble turned down below 300 Hz.
A horn, a cough or a door, turned down with a box on the spectrum.
Noise, hum and clipping, checked together.
Check a video's sound and hear 20 seconds repaired.
Every free tool on one page.
Make a free account and drop the same file into the editor to repair all of it, up to 30 minutes at a time.
Free account, no card.