Convert WAV to Opus

Some, and it is permanent — this is the one direction where information is genuinely thrown away. WAV holds every sample exactly; Opus 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 Opus. WAV normally stores raw uncompressed PCM — every sample kept exactly, at whatever bit depth and sample rate was captured. Opus scales from 6 kbps mono speech to 510 kbps stereo music in the same bitstream and switches modes automatically.

Yes, and it is a genuine gain over WAV, which has nowhere dependable to store any of it. Opus 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. Opus is the best-sounding lossy codec at low bitrates by a clear margin, and it powers WhatsApp voice notes, Discord and WebRTC.

Often not. WAV is decoded by essentially everything, including car head units and elderly players; Opus needs software that knows the codec, which standalone hardware frequently does not have. If the destination is a car stereo or a portable player, that is a strong argument for staying on WAV. Opus is almost never supported by standalone hardware — assume software playback only, and expect car stereos to ignore it.

Free accounts cap at 100 MB per file, and WAV sources run large because the format carries substantial per-chunk overhead on top of the video data. Premium lifts the cap considerably. If the file is split into numbered parts because of the format ceiling, 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.

Default is 192 kbps for lossy Opus; pass-through for lossless Opus. Override to 320 kbps for audiophile or 64-96 kbps for spoken-word audiobooks (transparent for voice, halves the file size).

If WAV is lossy and Opus is lossless (e.g. MP3 → WAV), the Opus file is no better than the WAV — you can't recover information that's already been thrown away. If WAV is lossless and Opus is lossy, expect the Opus codec to recompress; at 192 kbps this is transparent for most content.

Yes — title, artist, album, year, track number, album art, and chapter markers (important for audiobooks) are read from WAV and written into the Opus container where the Opus format supports tags. M4B audiobook structure round-trips into M4B and AAX → M4B output.

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.

By default yes (48 kHz WAV → 48 kHz Opus). If you need to downsample for compatibility (e.g. 96 kHz → 44.1 kHz for CD burning) the advanced sample-rate option does this with high-quality resampling.

Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the Opus output, targeting -14 LUFS (streaming standard), -16 LUFS (podcast standard), or -23 LUFS (audiobook standard). Useful when batch-converting tracks with varying mastering levels.

MP3 plays universally. AAC plays on Apple, most Android, Sonos. FLAC plays on Sonos and Android, less well on older iPods. M4B audiobooks play with chapter navigation on iOS Books, Audiobookshelf, and Smart Audiobook Player. The advanced options include device presets.