Upscale Audio Quality (Super-Resolution)
Low-bitrate, muffled or low-sample-rate audio is missing its high frequencies. Audio super-resolution rebuilds that missing top end, making the recording sound fuller and more detailed.
Pro Premium AI tool — included with any paid plan.
How it works
The model predicts the high-frequency content that a band-limited recording lost, extending it toward full 48 kHz bandwidth — like upscaling a low-resolution image, but for sound.
What it's good for
- Old MP3s and voice memos
- Telephone / VoIP recordings
- Compressed archival audio
- Muffled lecture captures
Details
- Engine
- VoiceFixer
- Formats
- MP3, WAV, M4A, FLAC, OGG, AAC
- Price
- Paid plans
Frequently asked questions
It predicts plausible high-frequency detail from patterns it learned, so the result sounds fuller. It's an informed reconstruction, not the original lost information.
Speech that is clear but dull or band-limited upscales beautifully. Heavily distorted or noisy input should be cleaned first with the relevant tool.
They overlap. Super-resolution targets general dullness; the bandwidth-extension tool is tuned specifically for telephone-grade narrowband audio.
Yes - since the top octave is generated, harsh or noisy source can produce a slightly synthetic shimmer or over-bright sibilance. Clean, dull speech upscales most convincingly.
The model extends content toward full 48 kHz bandwidth and returns a 48 kHz file, so even a narrowband or low-sample-rate source comes back at full resolution.
It rebuilds the actual high-frequency audio, not just the container settings, so the result genuinely sounds fuller rather than being a re-encode of the same muffled content at a bigger file size.
Yes - super-resolution will happily reconstruct and brighten any hiss or noise along with the voice, so remove noise first for a cleaner, more natural top end.