What it removes
Steady sounds behind the voice are reduced: microphone hiss, a fan or air conditioner, a refrigerator, distant traffic. The gaps between verses become quiet, and the voice stands out more clearly.
Sudden, loud sounds such as a door closing or another person speaking are harder to remove and may remain.
Keeping the voice intact
Noise reduction is the one setting here that touches the voice, so it is optional and adjustable. The strength slider blends between the original recording and the cleaned version. At lower settings the voice is essentially unchanged and the noise is simply quieter.
At the highest settings, long held notes and soft endings can lose some body. Switch between "Original" and "In the room" while listening, and lower the strength if anything sounds thin.
Clean first, then add the room
If you also want reverb, the noise is reduced before the room is added. Otherwise the hiss itself would echo around the hall. To clean a recording without adding any room, set "Room amount" to zero before saving.
Common questions
Will it remove an echo that is already in my recording?
No. It reduces steady background noise, not the sound of the room the recitation was recorded in.
How long does it take?
Usually a few seconds for a recitation of several minutes. It runs on your own device, so the speed depends on the device.
Can I clean a recording without adding reverb?
Yes. Turn on "Reduce background noise", set "Room amount" to zero, and save.
Is my recording sent to a server for cleaning?
No. The noise reduction runs inside your browser. The recording does not leave your device.