RIFF is a file structure for
multimedia resource files, it is not a
file
format but rather the structure that defines the class of more specific file
formats, such as WAV and AVI. The RIFF format specifications were first
developed by IBM and Microsoft, and published by in 1991 in "Microsoft
Windows Multimedia Programmer's Reference". Since 1990 no new multimedia
file formats have used the RIFF file structure.