RESTORE STUDIO · BETA 0.20.0

Give old recordings a careful second listen.

A small, completely local tool for inspecting and conservatively filtering your own audio files. It can filter rumble, remove a selected 50/60 Hz hum and reduce steady hiss using a short noise-only reference. It does not recover lost words, undo heavy compression or reconstruct missing frequencies.

Your file stays in this browser tab. No upload, account or cloud processing. This beta does not use AI synthesis.

1. Choose a recording

Select an audio file from this device

Formats depend on your browser's decoder. Mono/stereo, max 40 MB compressed and 30 million decoded samples (about 5–6 minutes of stereo at 44.1 kHz).

2. Choose a gentle treatment

Recording type Power-line hum notch Stationary noise reduction (off by default) Start of noise-only reference (seconds)

Important: select 0.6 seconds with ONLY steady background noise — no voice or music. The cleaner estimates the noise from this sample. Choosing speech as noise may damage intelligibility. Optional noise reduction supports up to 12 million decoded samples; other processing supports 30 million.

Optional peak normalization (target −2 dBFS, max +6 dB gain; no boosting clipped sources)

Choose a file to begin.

3. Listen and export

Match RMS playback level for comparison (preview only; exported audio is unchanged)

Original

Processed preview

Compare by ear: filtering can change tone, and it cannot make an inaudible word objectively clearer. Export is a NEW file and never overwrites your original.