Quick answer
For your first Noise reduction task, do not change many settings: run defaults once, then adjust one item at a time. Over-denoising sounds metallic; fix the noise source first.
Why it matters
Change one variable at a time so you know which setting matters.
Sample a noise-only section first.
Step by step
- Back up the original and confirm target format/duration/size.
- Select start/end on the waveform and audition the selection.
- Trim leading/trailing silence but keep natural attack/tail.
- Export WAV/target format and check duration/loudness/clipping.
- Keep the original; confirm rights/privacy before publishing.
Common mistakes
- Cutting the attack/tail so the edit sounds abrupt.
- Re-encoding MP3 repeatedly and accumulating loss.
- Exporting too loud and clipping.
- Publishing unlicensed music/someone's voice.
Checklist
- Original backed up.
- Start/end/duration are correct.
- No clipping/glitches/obvious silence.
- Format/sample rate/channels match the use.
- Rights/privacy cleared.
Key facts
- Sample a noise-only section first.
- Several gentle passes beat one aggressive pass.
FAQ
How do I start with Noise reduction?
For your first Noise reduction task, do not change many settings: run defaults once, then adjust one item at a time. Over-denoising sounds metallic; fix the noise source first.
How long does it take?
Usually 1-3 minutes; for intermittent issues, run 30 seconds and retest elsewhere.
Is data uploaded?
Runs locally and does not upload video/audio; extensions may still read the page.
Source: Audacity