What is a .RF64 file?
RF64 extends WAV past its 4 GB limit for long broadcast recordings.
- Did you know
- RF64 was created so broadcasters could record audio longer than WAV’s 4 GB ceiling.
- RF64 was specified by the European Broadcasting Union and adds a mandatory ds64 chunk whose 64-bit fields replace WAV’s 32-bit size limits.
- A recorder can reserve a placeholder JUNK chunk in a normal broadcast WAV and switch it to RF64 on the fly the moment recording passes 4 GB.
- What Analyser reads
- Identify many more audio formats: lossless/hi-res codecs (Monkey’s Audio, WavPack, TAK, True Audio, DSD/SACD, Musepack), pro containers (Core Audio, RF64/BW64, Wave64, Sun AU, Broadcast Wave with timecode), speech/mobile (Speex, AMR-WB, QCP, 3GA, M4R, GSM), MPEG Layer I/II, instrument banks (SoundFont, SFZ, DLS, RIFF MIDI, GigaStudio), ringtones (RTTTL, iMelody, SAP), tracker modules (MOD, XM, IT, S3M, OctaMED, 669, Oktalyzer), chiptunes (NES NSF, SNES SPC, VGM, Game Boy GBS, AY, YM) and Audacity projects.
- Depth of analysis
- .RF64 is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .RF64 file
- Drag a .RF64 file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.