FormatDrop doesn't convert AMR to WAV yet. The methods below use free tools that do. FormatDrop's own converters cover common image, audio, video and PDF formats, all in your browser.
Free tools for AMR to WAV
- 1
VLC (free, all platforms)
Media → Convert/Save (on a Mac: File → Convert / Stream) → add the .amr file → Profile: Audio - CD, which writes WAV → choose where to save → Start.
- 2
Audacity (free)
With Audacity's optional FFmpeg library installed, File → Open the AMR, clean it up if you like (Noise Reduction, Normalize), then File → Export Audio → WAV.
- 3
FFmpeg (command line)
ffmpeg -i input.amr -c:a pcm_s16le output.wav keeps the recording's own rate (8 kHz narrowband, 16 kHz wideband). For a speech-to-text service that wants 16 kHz mono: ffmpeg -i input.amr -ar 16000 -ac 1 output.wav.
Why convert AMR to WAV?
AMR is what your phone recorded; WAV is what audio software expects. Converting between them unlocks any voice recording for editing or analysis.
Frequently asked questions
FFmpeg command for AMR to WAV?
`ffmpeg -i input.amr -c:a pcm_s16le output.wav`. For upsampling to 44.1 kHz: `ffmpeg -i input.amr -c:a pcm_s16le -ar 44100 output.wav` (no quality gain, just compatibility with apps that require 44.1 kHz).
Why does the WAV file sound just like the AMR?
WAV is uncompressed but the original AMR was already lossy at low bitrate (typically 12.2 kbps). Converting to WAV preserves what's in the AMR exactly — quality cannot be recovered after compression. WAV's value is editability, not quality recovery.
Will speech recognition work better with WAV?
Often. Many speech-to-text services take WAV, and OpenAI's transcription API doesn't accept AMR at all. Use the sample rate the service asks for; 16 kHz mono is common.
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