Take it step by step
- Listen to the unmodified original. Use loudness normalization when a whole recording is difficult to hear; use gain only for a deliberate fixed adjustment.
- Choose the target LUFS. The default -16 LUFS is a starting point for speech, not a mandatory platform specification.
- For silence removal, start with -40 dB and a 0.3-second quiet interval. Lower the threshold if quiet words disappear.
- Apply fades only at known positions. The default synthetic example is one second long; change fade-out start to match your own recording.
A situation to try.
For a 30-second voice memo, try fade-in 0.25 seconds and fade-out starting at 29.5 seconds for 0.5 seconds. A quiet final syllable may need a later or gentler fade.
Use the tool’s synthetic example first where available. The example here explains a decision; it is not a reported benchmark result.
Before you call it done.
- Positive gain can clip peaks.
- Single-pass normalization can differ from two-pass measured mastering.
- Listen around every removed pause; pacing matters.
- Review mono mixes for phase cancellation.
Know the limits.
Threshold-based silence detection can remove soft speech and room tone. These tools do not offer AI noise removal or vocal/stem separation. Always keep the original.
This tool’s current boundary: Single-pass loudness normalization is approximate for short clips. This is not mastering or background noise removal.
Evidence and scope
Technical source guidance and task-specific output checks. These do not establish that every file, browser or device passes.
Use the checks above on your own exported result. A source explains the format or mechanism; it is not proof that this export preserved every feature.
Technical reference: FFmpeg: filters and media processing ↗
Choose the right tool for this step.
Audio loudness normalizer
Adjust a recording toward a chosen integrated loudness.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Audio gain adjustment
Increase or reduce recording volume in decibels.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Audio fade in and out
Add smooth starts and endings with precise fade times.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Trim audio silence
Remove quiet intervals with an adjustable detection threshold.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Stereo to mono
Mix stereo channels into a single-channel recording.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Merge audio files
Join up to eight recordings in your chosen order.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Split audio into parts
Divide a recording into individually downloadable timed parts.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Try Audio loudness normalizer ↗
Preparation tools process locally. Official service links take you to the authority’s website. Inspect any exported copy before sharing it.