🎧 We recommend listening with headphones. Each pair of clips is taken from the exact same segment of the recording, making it easy to catch every subtle change in detail.
To ensure smooth, immediate playback in the browser, all audio files on this page are encoded at 44.1 kHz, 192 kbps MP3 (our desktop apps export to pristine, uncompressed WAV). The sample clips are sourced from public recordings on Freesound. The “before” versions preserve the original stereo mix, while the “after” versions showcase the clean dialogue isolated by our algorithms.
Pure Refine: Stripping away noise and room reverb so the voice steps forward
In real-world field interviews and live recording situations, you don’t just fight ambient noise—empty rooms and hard walls also bounce harsh reflections back into the microphone, muddying the dialogue. Pure Refine runs denoising and dereverberation simultaneously, purpose-built for speech drowned out by traffic roar, bustling crowds, and hollow room acoustics.
Denver Street Interview
Our interviewee, Tico, is walking along a sidewalk in Denver chatting about his experience seeing U2 live. This clip captures the first 32 seconds of the recording. The original audio is washed over by constant street traffic and urban rumble. Put on your headphones and notice: as the background noise gets pushed back, the speaker’s crisp consonants and natural breath pauses remain fully intact.
Audio source: kerouacsamerica / 31525, licensed under CC BY.
Interview in an Okinawa Market
An energetic Eisa drum-and-dance festival is underway inside this Okinawa market, with the speaker’s voice caught right in the middle of booming drums and shouting crowds. This 30-second snippet spans from 0:06 to 0:36. As you listen, pay attention to how fragile speech that was almost swallowed whole by the percussion and crowd noise emerges front and center once the overwhelming boom is stripped away.
Audio source: morgantj / 59656, licensed under CC BY.
Pure Restore: Repairing legacy damage and bringing back vocal warmth and body
Archival recordings from AM radio, magnetic cassettes, and vintage media often suffer from harsh high-frequency tape hiss, crackle, and severe spectral loss. Pure Restore’s balanced vocal restoration mode is designed to rebuild damaged acoustic bands in degraded media—taming stubborn noise floors while putting warmth, fullness, and presence back into thin, brittle voices.
2001 Radio Weather Forecast
A 40-second radio weather forecast recorded from an on-air broadcast in 2001. The original transmission is laced with static hiss, band dropouts, and a hollow telephone-like timbre. In the restored version, listen to how the radio noise recedes, allowing the announcer’s natural cadence, articulation, and authentic low-mid warmth to smoothly re-emerge.
Audio source: Beetlemuse / 620358, released under CC0 into the public domain.
1991 Archival Radio Interview
The uploader shared a precious clip of their own 11-year-old self being interviewed on the radio, running about 29 seconds. The original recording carries the signature wear, hiss, and slight distortion of aged tape. The restored track pulls back the tape noise while carefully preserving the young speaker’s natural tone, inflection, and continuous speech flow.
Audio source: milton. / 103000, licensed under CC BY-NC.
Two tools, two distinct purposes
| Pure Refine | Pure Restore | |
|---|---|---|
| Listening scenarios | Street interviews, bustling outdoor markets | 2001 radio broadcasts, 1991 vintage tape interviews |
| Core processing | Real-time denoising + dereverberation | Balanced vocal restoration & spectral reconstruction |
| Learn more | Explore Pure Refine | Explore Pure Restore |
What to listen for with headphones
- Consonant clarity and articulation: Listen closely to sibilance and plosives. Notice how the background wash falls away while delicate speech details stay crisp and punchy.
- Natural breathing and speech dynamics: Track the subtle intakes of breath and pitch inflections to ensure the voice retains the organic warmth and dynamic expression of a real human being.
- Depth and preservation of texture: Experience how cleanly the foreground voice is separated from the background noise, giving you a clean listening experience without sacrificing the emotional authenticity of the original recording.
The 1991 radio interview used in this demo is licensed under CC BY-NC, displayed here strictly for non-commercial audio comparison and research, with full author attribution.