CONVERT W64 → AIF (W64 to AIF)
Fast, secure W64 to AIF conversion. No registration required.
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HOW TO CONVERT W64 → AIF
Upload the W64
Drop or select your W64 file. The upload is encrypted and the file is queued for conversion.
Transcode via FFmpeg
FFmpeg decodes the W64 stream to PCM internally, then re-encodes as AIF at the bitrate you select.
Download the AIF
The AIF is delivered as a direct download; metadata and cover art transfer automatically where possible.
Why this pair exists — W64 is an audio format with specific trade-offs between file size, bitrate flexibility, and device support. Ergo, the AIF route. Need a AIF version of a W64 recording for a podcast host, audio book platform or DAW that refuses the original container? Drop the file above and our encoder produces a clean AIF you can drag straight into the destination tool. Metadata such as title, artist and cover art travels with the audio. Technical note: W64 is an audio format with specific trade-offs between file size, bitrate flexibility, and device support. Compare that with AIF (AIFF) is Apple's uncompressed audio container, historically used on Mac workflows.
Why convert W64 to AIF
Sony Wave64 is great in its own niche, but AIFF Audio (short) is either more universally playable or better suited to the device you are targeting. Converting lets you ship the audio without asking listeners to install a codec. The loss in quality between the two is negligible at sensible bitrates.
W64 vs AIF — Technical specifications
Side-by-side comparison of the technical details.
W64
- MIME type
- audio/x-w64
- Extension
- .w64
- Max size
- 2^64 bytes
- Relative
- RF64 (EBU 64-bit WAV)
- MIME Type
- audio/x-w64
- Category
- Audio Files
- Full Name
- Sony Wave64
- Conversion Engine
- FFMPEG
AIF
- MIME type
- audio/aiff
- Extension
- .aif
- MIME Type
- audio/aiff
- Category
- Audio Files
- Full Name
- AIFF Audio (short)
- Conversion Engine
- FFMPEG
- Container
- IFF (big-endian PCM)
- Alias of
- .aiff
- Variants
- .aifc (AIFF-Compressed)
| Specification | W64 | AIF |
|---|---|---|
| MIME type | audio/x-w64 | audio/aiff |
| Extension | .w64 | .aif |
| Max size | 2^64 bytes | — |
| Relative | RF64 (EBU 64-bit WAV) | — |
| MIME Type | audio/x-w64 | audio/aiff |
| Category | Audio Files | Audio Files |
| Full Name | Sony Wave64 | AIFF Audio (short) |
| Conversion Engine | FFMPEG | FFMPEG |
| Container | — | IFF (big-endian PCM) |
| Alias of | — | .aiff |
| Variants | — | .aifc (AIFF-Compressed) |
W64 vs AIF — Strengths and limitations
What each format does best, and where it falls short.
W64 Strengths
- Unlimited file size (64-bit chunks).
- Professional DAW compatibility.
- Bit-exact lossless.
Limitations
- Less universal than WAV.
- Niche — only matters for very large sessions.
- Competes with RF64.
AIF Strengths
- Lossless and uncompressed — bit-exact audio.
- Universal Mac compatibility.
- Compatible with every pro audio editor.
- 3-character extension for legacy Windows.
Limitations
- Large files — no compression.
- Same limitations as .aiff.
- Redundant extension in modern workflows.
Quality & Compatibility
Lossy-to-lossy transcoding (most cross-format audio jobs) loses a tiny amount of quality on each pass — usually inaudible at our default VBR ~190 kbps for music or 96 kbps for speech. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy is only as good as the target bitrate you choose.
Tips for Best Results
- Pick 128 kbps for podcasts and voice, 192–256 kbps for music, 320 kbps only if the audio will be edited further downstream.
- Keep the W64 master alongside the AIF — re-encoding a lossy format twice accumulates audible artefacts.
- For mono voice content, convert to mono AIF explicitly to halve file size without any quality loss.
Frequently Asked Questions
Lossy-to-lossy conversions (most combinations) re-compress the audio, which technically introduces some loss. At a 192 kbps or higher target it is inaudible on normal equipment. Lossy-to-lossless conversions freeze the existing quality but cannot improve it; lossless-to-lossy transcodes are only as good as the target bitrate you choose.
For voice content (podcasts, audiobooks, lectures) 128 kbps is indistinguishable from higher bitrates. For music, 192-256 kbps covers most listening; 320 kbps is the ceiling for AIF and the right choice for audio you plan to edit further. Above that, prefer a lossless target instead.
Yes. Title, artist, album, year and cover art travel from the W64 container to the AIF container automatically where both formats support them. If a tag field has no AIF equivalent, it is dropped silently. Use any tag editor (Mp3tag, MusicBrainz Picard) to fine-tune afterwards.
Sony Wave64
Source formatWave64 (W64) is an extension of the WAV format developed by Sony that breaks the 4 GB file size limit of standard WAV by using 64-bit chunk sizes. It is used in professional audio production for very long or multi-channel recordings.
AIFF Audio (short)
Target formatAIF is the short file extension for AIFF (Audio Interchange File Format), an uncompressed audio standard developed by Apple based on the IFF structure. It provides CD-quality lossless audio and is widely used in professional music production on macOS.
Going the other way? Convert AIF back to W64 with the same engine.
Common Use Cases
Share across platforms
Send AIF files to anyone without worrying about whether they have the right software for W64.
Embed in documents
Drop AIF output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
AIF often produces smaller files than W64 for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
W64 vs AIF — Typical file sizes
Approximate file sizes for common scenarios.
- 1-hour 24-bit 48 kHz mono ~620 MB
- 48-hour field recording ~30 GB
- 3-min song (CD quality) 30 MB
- 3-min song (24-bit / 96 kHz) 100 MB
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Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
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