Rich Music Format is a music file format defined by Beatnik

Beatnik (disambiguation)

Beatnik can mean:*Beatnik, a distortion of the Beat Generation into a media stereotype*Beatnik, an esoteric computer programming language*Beatnik Inc., a technology company specializing in mobile phone audio file formats *Beatnik satellite, a Sputnik-99 satellite launch aborted by Swatch in...

. It is a wrapper

Wrapper

Wrapper generally refers to a type of packaging, such as a flat sheet made out of paper, cellophane or plastic to enclose an object.Wrapper may also refer to:* Wrapper , a woman's garment which is worn over nightwear or lingerie...

 for audio formats including .wav, .au

.au

.au is the Internet country code top-level domain for Australia.-History:The domain name was originally allocated by Jon Postel, operator of IANA to Kevin Robert Elz of Melbourne University in 1986. After an approximately five year process in the 1990s, the Internet industry created a self...

, .aiff, .mp3 and MIDI. RMF's purpose is to encrypt the data, and to store MIDI together with instrument sounds. RMF is not widely used as of 2009, but is noteworthy from the fact that the reference implementation of the Java Media Framework

Java Media Framework

The Java Media Framework is a Java library that enables audio, video and other time-based media to be added to Java applications and applets...

 and JavaSound can play RMF files.