Speech restorer with AI noise removal and bandwidth extension

Phone call recordings, old cassette/VHS tapes, conference room recordings, noisy environment captures, muffled or underwater-sounding audio, and any speech that is difficult to understand due to degradation.

No: they are not in the recording, and harmonics “drawn in” on top added neither intelligibility nor quality when we measured them — so the tool does not add them. It makes what is in the recording clearer: noise and echo are removed gently, because heavy suppression makes narrow-band speech less intelligible.

Yes. The recording is processed in 30-second blocks, so memory use does not grow with its length, and an hour of speech goes through as one file. How long it takes depends on your computer — the progress bar shows the time left. Keep the tab open until it finishes, and on a phone do not switch to other apps.

This tool is designed for general speech clarity improvement. For forensic or legal purposes, always work with the original unprocessed file and consult a professional audio forensics expert.

Keep Auto: it measures how far the speech stands above the noise and whether the room echoes, and chooses the strength from those numbers. A recording type helps when you know more than the measurement shows: Noisy cleans deeper, Phone Call, Old Recording, Muffled and Radio more gently, Conference always removes the echo. To try another setting, you do not need to choose the file again.