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Audio De-Echo

Reduce echo and background noise from a recording.

Audio Format Converter

Convert audio to MP3, WAV, OGG, M4A or FLAC.

Audio Joiner & Merger

Combine multiple audio files with crossfade.

Compress a Voice Recording

About this option

A voice memo or meeting recording contains little above 8 kHz, so a 22 kHz sample rate and a mono track lose almost nothing audible. This page opens the compressor at 64 kbps, 22.05 kHz mono — the smallest sensible size for speech.

When to use it

  • Storing hours of meeting or lecture recordings
  • Sharing a long voice memo over chat
  • Creating small archive copies of interviews

How to use it

  1. 1Drop your recording — 64 kbps, 22 kHz mono is already chosen
  2. 2Click Compress
  3. 3Check that the voice is clear, then download the MP3

Frequently asked questions

Why lower the sample rate?

Speech has little energy at high frequencies, so a lower rate removes data you can hardly hear without affecting clarity.

Is it suitable for music?

No. Music loses brightness at 22 kHz; use the Reduce MP3 File Size option instead.

Will it help with phone call recordings?

Yes. They are already narrow-band mono speech, so they shrink a lot with little change.

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