BFWAV File

What are BFWAV files and how to open them

Are you having problems opening a BFWAV file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your BFWAV files.

What is a BFWAV file?

A .BFWAV file is a Binary CaFe WAVe Audio file.

Binary CaFe WAVe Audio files store sound samples used by certain Nintendo Wii U and Switch games. They are audio assets such as sound effects or background music. These files contain both metadata (for playback parameters) and the raw audio data, enabling features like looping and multiple channels.

Nintendo itself writes these files during the game's development, embedding them within archives such as BARS. They are not general-purpose sound files but part of Nintendo's internal sound resource system. Game engines designed for Nintendo platforms read and decode them during gameplay.

Internally the format begins with ASCII magic "FWAV" at byte offset zero, followed by a header that locates an INFO section and a DATA section. The INFO section specifies sample format (such as PCM8, PCM16, IMA ADPCM or DSP ADPCM), sample rate, looping parameters, and number of channels. The DATA section holds the actual audio or compressed audio data.

How to open BFWAV files

Important: Different programs may use files with the BFWAV file extension for different purposes, so unless you are sure which format your BFWAV file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: August 24, 2026

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about BFWAV file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.