Online W64 Player - Play Sony Wave64 Audio Files in Your Browser

W64 (Sony Wave64) is an audio file format developed by Sony to overcome the fundamental 4 GB file size limitation of the standard WAV format. Standard WAV uses 32-bit file offsets in its RIFF container structure, which caps the maximum file size at 4,294,967,295 bytes (approximately 4 GB). For professional audio recording at high sample rates and bit depths, this limit is easily reached — a single hour of 24-bit/96 kHz stereo audio requires approximately 2 GB, meaning recordings longer than about two hours would exceed the WAV limit. W64 solves this by replacing the RIFF container with a 64-bit structure using GUIDs (Globally Unique Identifiers) instead of four-character chunk codes, allowing files of virtually unlimited size. The audio data itself is identical to WAV — uncompressed linear PCM — making W64 a direct extension of the WAV format rather than a new codec.

W64 was introduced with Sony's Sound Forge audio editor and has since been adopted by other professional digital audio workstations including Reaper, Audacity, and various broadcast and post-production tools. It is particularly common in broadcast recording, live event capture, scientific audio recording, and any professional workflow that requires continuous long-duration recordings at high quality. W64 files use the .w64 extension and are structurally similar enough to WAV that many audio tools can read them with minimal modification. However, because W64 is less universally supported than WAV, users often encounter compatibility issues when sharing files with software or hardware that only supports standard WAV. Understanding W64 is important for audio engineers, broadcast professionals, and anyone working with long-duration high-resolution audio recordings.

Key Features of the W64 Format

• No 4 GB Limit: Uses 64-bit file offsets allowing recordings of virtually unlimited size — essential for long-duration professional audio
• Uncompressed PCM: Stores lossless uncompressed audio data identical in quality to standard WAV — no compression artifacts
• High Resolution: Supports all professional sample rates and bit depths including 24-bit/96 kHz, 32-bit/192 kHz, and beyond
• GUID-Based Structure: Uses Globally Unique Identifiers for chunk identification instead of WAV's four-character codes, enabling the 64-bit addressing
• DAW Compatible: Supported by Sound Forge, Reaper, Audacity, and other professional audio workstations used in broadcast and post-production
• WAV Compatible Audio: The PCM audio data inside W64 is identical to WAV, making conversion between the two formats lossless and straightforward

W64 vs Other Large Audio Formats

• W64 vs WAV: W64 and WAV store identical uncompressed PCM audio. The only difference is the container — W64 uses 64-bit offsets removing the 4 GB limit, while WAV is limited to 4 GB but has universal software and hardware support.
• W64 vs RF64: Both solve the WAV 4 GB limit with 64-bit addressing. RF64 is the EBU broadcast standard with wider adoption in European broadcasting, while W64 is Sony's solution more common in DAW workflows. Both store uncompressed PCM audio.
• W64 vs CAF: Both overcome the 4 GB limit with 64-bit structures. CAF is Apple's solution with multi-codec support and rich metadata, while W64 is Sony's simpler WAV extension focused purely on uncompressed PCM audio for professional recording.