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QDX is an old lossy audio compression format, designed for portable multimedia players with small amount of memory.


QDX files are encoded at 128 kbit/s but bitrate can be "peeled" so that lower bitrate stream can be extracted and saved on portable player (up to 2.5 hours of music on a 32 MB) without need of transcoding, which is called Fit-To-Media.

What is more, this format is resistant to dropouts while streaming, which is called Fit-To-Stream.

QDX format also offers DRM info, which prevents from unauthorized use of files.

Hardware support[edit]

iriver iDP-100 can play QDX files. [1]

See also[edit]

External links[edit]