Step 1: Provide your WAV files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted AMR files.
WAV to AMR Conversion FAQ
How do I convert WAV audio to AMR without losing quality?
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Upload the WAV file and the converter chooses the AMR codec / bitrate combination that matches the source profile. Lossless AMR (WAV / FLAC / ALAC) preserves every sample exactly; lossy AMR (MP3 / AAC / OGG / Opus) defaults to 192 kbps which is transparent for almost all music content. WAV normally stores raw uncompressed PCM — every sample kept exactly, at whatever bit depth and sample rate was captured. AMR is a narrowband speech codec running between 4.75 and 12.2 kbps, modelling the human vocal tract rather than the full audio spectrum.
How much quality do I lose converting WAV to AMR?
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Some, and it is permanent — this is the one direction where information is genuinely thrown away. WAV holds every sample exactly; AMR discards what a psychoacoustic model predicts you will not hear. At 192 kbps and above that prediction is good enough to be transparent on most material and most equipment. Keep the WAV as your master, because you cannot get back to it from the AMR.
What happens to multichannel audio when converting WAV to AMR?
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It is folded down to stereo, because AMR has no practical multichannel mode. The downmix uses the standard coefficients so centre-channel dialogue stays clear and the surrounds are mixed in at reduced level. Anything that depended on discrete channel placement is gone once that happens. AMR destroys music: its 8 kHz bandwidth removes everything above telephone frequencies, and no amount of re-encoding brings it back.
Why does music sound so poor in this conversion?
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Because one side of it is a speech codec rather than a music codec. It models the human vocal tract and discards everything outside telephone bandwidth, which is fine for a voice memo and destructive for anything with instruments in it. Converting away from it cannot restore the missing frequencies — they were never encoded in the first place. WAV is enormous — roughly 10 MB per stereo minute at CD quality — and the classic format has a 4 GB ceiling and no room for proper tags.
Will a long WAV recording upload successfully?
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Free accounts cap at 100 MB per file, and WAV runs to roughly 10 MB per minute in stereo because nothing about it is compressed — every sample is stored at full width. Ten minutes is already at the limit. Premium lifts the cap considerably, and the format has its own 4 GB ceiling above that, which is why long sessions arrive split into numbered parts; upload them together and they are treated as one job.
What bitrate does the AMR file end up at?
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Default 192 kbps for lossy AMR; pass-through for lossless AMR. Override to 320 kbps if you want maximum lossy fidelity, 128 kbps for size-constrained podcast distribution, or 96 kbps for voice-only sources where the smaller file matters more than studio detail.
Will going from WAV to AMR actually reduce my audio quality?
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If WAV is lossy (MP3, AAC) and AMR is lossless (WAV, FLAC), the AMR is no better than the WAV — you cannot recover information already discarded by the lossy WAV codec. If WAV is lossless and AMR is lossy, expect the AMR encoder to recompress; at 192 kbps the loss is imperceptible to most ears.
Does the WAV to AMR converter keep ID3 / metadata tags?
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Yes — title, artist, album, year, track number, album art, BPM, replay-gain are read from the WAV container and written into the equivalent fields on the AMR container. ID3v2 (MP3), Vorbis comments (OGG, FLAC), MP4 atoms (AAC, M4A), RIFF INFO (WAV), iXML chunks all map cleanly. AMR is Adaptive Multi-Rate, the speech codec 3GPP standardised for GSM voice calls and mobile voice recorders.
Can I batch-convert hundreds of WAV files into AMR?
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Yes — drop a folder of WAV files in and we process them in parallel. Premium has more parallel workers and no per-file size cap, so a 500-file batch finishes in minutes rather than tens of minutes. Folder structure is preserved in the output ZIP.
Will the AMR keep the same sample rate as the WAV?
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By default yes (a 48 kHz WAV produces 48 kHz AMR, a 44.1 kHz WAV produces 44.1 kHz AMR). For specific compatibility — e.g. downsampling 96 kHz studio masters to 44.1 kHz AMR for CD burning, or upsampling 22 kHz voicemail to 44.1 kHz AMR — the sample-rate dropdown applies high-quality SOX-style resampling.
Can I normalize loudness in the WAV to AMR step?
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Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the AMR output, targeting -14 LUFS (streaming standard) or -16 LUFS (podcast standard) or a custom value. Useful when batch-converting tracks with varying mastering levels into a single AMR playlist.
Will the AMR play on my car stereo / iPod / Sonos / Bluetooth speaker?
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MP3 plays universally on every device made in the last 20 years. AAC plays on Apple, most Android, Sonos, and modern car stereos. FLAC plays on Sonos and recent Android, less well on older iPods. WAV plays on everything but the file is huge. The device-target dropdown picks a safe AMR codec for the platform you specify. AMR makes voice recordings absurdly small — an hour of speech fits in a few megabytes — and it is what many phones still record calls in.
