Quick Verdict
Use AMR when…
Use AMR only when storage is extremely constrained and the content is voice. AMR's low bitrate (typically 12.2 kbps) makes it ideal for cellular networks and voicemail systems.
Use WAV when…
Use WAV for any audio editing, transcription, or production workflow. WAV is the universal exchange format for audio software and preserves all the detail your source contains.
AMR vs WAV: Feature Comparison
| Feature | AMR | WAV |
|---|---|---|
| Compression | Lossy, voice-optimized | Uncompressed PCM |
| Typical bitrate | 12.2 kbps | 1411 kbps (CD-quality) |
| File size (1 minute) | ~90 KB | ~10 MB |
| Audio quality | Telephone-grade voice only | Full-range, high-fidelity |
| Editor compatibility | Limited (some DAWs) | Universal |
| Music suitability | Terrible — voice only | Excellent |
When AMR wins
- ✓Compression: Lossy, voice-optimized
- ✓Typical bitrate: 12.2 kbps
- ✓File size (1 minute): ~90 KB
When WAV wins
- ✓Compression: Uncompressed PCM
- ✓Typical bitrate: 1411 kbps (CD-quality)
- ✓File size (1 minute): ~10 MB
Frequently asked questions
Can I edit AMR audio in Audacity?
Audacity 3.x supports AMR via FFmpeg integration. Better workflow: convert AMR to WAV first (`ffmpeg -i input.amr output.wav`), then edit the WAV. The conversion is lossless from AMR's perspective.
Why is AMR so common for voicemail?
Voicemail systems were designed for cellular networks where every byte matters. AMR at 12.2 kbps produces intelligible voice in tiny files — perfect for store-and-forward voicemail. It sounds bad for music, fine for voice.
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More comparisons
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