.G721 Bestandsextensie

The ITU is a division of the United Nations responsible for coordinating the world's response to communication technology issues. Among other things, the ITU creates standards for saving and transmitting audio. The G.721 codec, which was released in 1984, is one such standard.

G.721 has since been superseded by the G.726 standard. As a result, you are unlikely to encounter G721 files.

You can use FFmpeg (multiplatform) or libsndfile (multiplatform) to play the audio a G721 file contains.

You can use FFmpeg (multiplatform) or libsndfile (multiplatform) to convert the audio a G721 file contains to other formats. For example, FFmpeg can convert the audio a G721 file contains to many common audio formats, including .MP3, .WAV, .FLAC, and .AAC.