AMR to WAV Converter

How to Convert AMR to WAV Online

1. Upload Your AMR Files: Drag and drop or click "Add Files" to select AMR recordings from your computer. Old Android Voice Memos, dumbphone voicemail dumps, MMS audio attachments, and call recordings from apps like ACR or Cube Call Recorder all work. Batch upload is supported.
2. Pick the WAV Codec: Default is PCM_S16LE (16-bit little-endian, the universal CD-standard PCM that every editor reads). Choose PCM_S24LE for 24-bit headroom in DAWs, PCM_S32LE for 32-bit float mastering, or PCM_ALAW / PCM_MULAW for telephony-grade output. PCM_S16BE is available for legacy big-endian Mac systems.
3. Set Sample Rate and Channels (Optional): AMR is recorded at 8 kHz (narrowband) or 16 kHz (wideband). Pick "Original" to keep the source rate, or upsample to 44.1 kHz for CD/music software, 48 kHz for video projects. Choose mono (recommended for speech — half the file size) or stereo. Optionally trim the recording with start time and duration in HH:MM:SS.sss format.
4. Convert and Download: Click Convert. Files process in your browser session and download individually or as a ZIP — no sign-up, no watermark, no upload to a third-party server.

Why Convert AMR to WAV?

AMR (Adaptive Multi-Rate) is a speech-optimized codec built by Ericsson and adopted by 3GPP for GSM/UMTS mobile networks. It compresses voice down to 4.75-12.2 kbps for narrowband (AMR-NB at 8 kHz) or 6.6-23.85 kbps for wideband (AMR-WB at 16 kHz) — about 100× smaller than CD audio, but unusable for music. WAV stores uncompressed PCM samples that every editor reads natively. Common reasons to convert AMR → WAV:

• Editing legacy voice recordings in Audacity, Adobe Audition, or GarageBand — most desktop audio editors don't ship with an AMR decoder. Converting to WAV unlocks noise reduction, EQ, compression, normalization, and clipping fixes for old voicemails and call recordings.
• Speech-to-text transcription pipelines — Whisper, Deepgram, Google Speech-to-Text, and AWS Transcribe accept WAV reliably. AMR support is hit-or-miss across ASR APIs, especially for AMR-WB. Converting first removes the gamble.
• Archiving voicemails from old Android phones — Samsung Galaxy, HTC, LG, and pre-2018 Android Voice Recorder defaulted to .amr. Converting to WAV future-proofs the recordings against decoder deprecation (modern Android Auto and many media players have already dropped AMR).
• Forensic and legal evidence preservation — courts and forensic analysts require uncompressed audio for clean spectrograms and frequency analysis. WAV is the standard submission format; AMR's adaptive bitrate makes it unsuitable for forensic review.
• MMS audio and call recording app exports — apps like ACR, Cube Call Recorder, and Boldbeast saved years of recordings as AMR. Convert the archive to WAV once for permanent editability.
• Importing into broadcast and podcasting workflows — Pro Tools, Reaper, Hindenburg, and most podcast hosts expect WAV or MP3 as input. WAV gives you the clean PCM source to clean up before re-encoding.

See also MP3 to WAV and M4A to WAV if your archive mixes formats.

AMR vs WAV — Format Comparison

WAV Encoding Options for Speech

Frequently Asked Questions

Will converting AMR to WAV make my voice recording sound better?

No. AMR is a lossy speech codec — once audio is encoded as AMR, frequencies above 3.4 kHz (narrowband) or 7 kHz (wideband) are gone, and the speech-coded waveform is a parametric reconstruction rather than a faithful sample stream. Converting to WAV unwraps that reconstruction into uncompressed PCM but cannot add detail that AMR threw away. The benefit is editability and preventing further loss when you process the audio.

Should I pick narrowband or wideband settings for my output WAV?

Match the source. AMR-NB recordings (8 kHz sample rate) gain nothing from upsampling beyond 8 or 16 kHz — interpolation invents data that wasn't captured. AMR-WB (16 kHz) can be left at 16 kHz or upsampled to 44.1/48 kHz if your editor or transcription tool requires it. XConvert detects the source rate; pick "Original" if unsure.

Why is my WAV so much larger than the AMR?

WAV stores every sample at full bit depth without compression; AMR stores a tiny set of vocal-tract parameters per frame. A 60-second AMR voicemail at 7.4 kbps is about 55 KB. The same 60 seconds as 16-bit / 16 kHz mono PCM WAV is about 1.9 MB — roughly 35× larger. Stereo 44.1 kHz pushes it to 10 MB. This is normal and expected; WAV is for editing and archival, not storage efficiency.

Can I batch convert a whole folder of AMR voicemails at once?

Yes. Drop in dozens or hundreds of .amr files at once. Each file converts in parallel within your browser session and downloads as individual WAVs or a single ZIP. Useful for clearing out a years-old call recording archive from an old Samsung or HTC phone.

Does this work for both AMR-NB and AMR-WB (.awb) files?

Yes. The decoder handles AMR-NB (8 kHz, the original .amr format used by most older Android phones and MMS) and AMR-WB (16 kHz, sometimes saved as .awb, used in HD voice / VoLTE recordings). XConvert detects the codec automatically from the file header.

Will my old Android voicemail keep its timestamp metadata?

The audio data is preserved exactly — but file-system timestamps and any phone-specific metadata (caller ID notes, recording app comments) live outside the AMR container and don't survive the codec conversion. If you need timestamps, save the original filename (which usually contains the date) before uploading.

Can I trim a long call recording before saving it as WAV?

Yes. Use the trim section to enter a start time and duration. Both accept seconds (12.5) or HH:MM:SS.sss format (00:01:30.500). Useful for cutting a single statement out of a long call recording or trimming silence from the start of a voicemail before transcription.

Why do my Pro Tools / Audacity sessions reject the AMR directly?

Most desktop DAWs ship without AMR decoders because of historic licensing fees on the codec — Pro Tools, Logic Pro (until recently), Audition, and older Audacity builds simply refuse to import .amr. Converting to WAV gives them raw PCM, which every audio app reads natively. This is the single most common reason people convert AMR.

Is converting AMR to WAV good enough for forensic or legal evidence?

WAV is the standard format for forensic audio submission because it's uncompressed and bit-exact. However, the underlying recording is still bound by AMR's lossy encoding — frequencies and detail discarded by AMR cannot be recovered. For evidentiary value, preserve and submit BOTH the original AMR file and the WAV decoding so analysts can verify the conversion is faithful.