Step 1: Transfer your WAV files using the button above or by slide and deposit.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Retrieve your converted M4A files.
WAV to M4A Conversion FAQ
How do I convert WAV audio to M4A without losing quality?
+
Upload the WAV file and the converter chooses the M4A codec and bitrate to match the source. Lossless M4A (WAV / FLAC / ALAC) preserves every sample bit-identically; lossy M4A (MP3 / AAC / OGG / Opus) defaults to 192 kbps which is transparent for most ears. WAV normally stores raw uncompressed PCM — every sample kept exactly, at whatever bit depth and sample rate was captured. An M4A holds AAC in most cases, or Apple Lossless (ALAC) when it came from a lossless rip.
How much quality do I lose converting WAV to M4A?
+
Some, and it is permanent — this is the one direction where information is genuinely thrown away. WAV holds every sample exactly; M4A 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 M4A.
Can I tag the M4A with artist and album information?
+
Yes, and it is a genuine gain over WAV, which has nowhere dependable to store any of it. M4A carries title, artist, album, year, track number and embedded cover art in the container itself, so a music library files it correctly without a manual pass. M4A keeps rich iTunes-style metadata, chapters and artwork intact, and is the native audio format across every Apple device.
Will a long WAV recording upload successfully?
+
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. 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.
What bitrate will the resulting M4A file use?
+
Default is 192 kbps for lossy M4A; pass-through for lossless M4A. Override to 320 kbps for audiophile or 96 kbps for voice / podcast. The choice trades file size against audible fidelity; below 96 kbps lossy artifacts become noticeable on music.
Will going from WAV to M4A reduce my audio quality?
+
If WAV is lossy and M4A is lossless (e.g. MP3 → WAV), the M4A is no better than the WAV — you cannot recover information already discarded. If WAV is lossless and M4A is lossy, the M4A codec recompresses; at 192 kbps the result is transparent for most content.
Does the WAV to M4A converter keep ID3 / metadata tags?
+
Yes — title, artist, album, year, track number, and album art are read from the WAV container and written into the M4A container where the format supports tags. All common targets (MP3, AAC, FLAC, OGG) handle tags fine; raw WAV does not. M4A is an MP4 container carrying audio only, and it is what iTunes, Apple Music and the iPhone Voice Memos app produce.
Can I batch convert hundreds of WAV files to M4A?
+
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.
Will the M4A keep the same sample rate as WAV?
+
By default yes — 48 kHz WAV stays 48 kHz in M4A. If you need to downsample for compatibility (96 kHz → 44.1 kHz for CD burning), the sample-rate option applies high-quality resampling in the same encode pass.
Can I normalize loudness when converting WAV to M4A?
+
Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the M4A, targeting -14 LUFS (streaming standard) or -16 LUFS (podcast standard). Useful when batching tracks mastered at varying levels.
Will my M4A play on car stereo, iPod, and Sonos?
+
MP3 plays everywhere. AAC plays on Apple, most Android, and Sonos. FLAC plays on Sonos and Android but not on older iPods. WAV plays on everything but is huge. The advanced device-preset dropdown picks an M4A codec optimized for your target hardware. M4A hides two very different things behind one extension — lossy AAC and lossless ALAC — and non-Apple hardware support is inconsistent.
Is my WAV file private during conversion to M4A?
+
Yes — uploaded WAV files are processed in isolated workers and deleted within minutes. We never play back, store long-term, or share the audio content. The full retention window is in /privacy/.
M4A is an audio file format that is closely related to MP4. It offers high-quality audio compression with support for metadata, making it suitable for various applications.
