HP R4.2 - Manual (Page 452)

A
Summary of Commands decode
UCS 1000 R4.2 Administration 585-313-507 Issue 3 April 2000 413
decode
The decode command converts adpcm16 or adpcm32 files to pcm64 files
(SSP
only ).
Synopsis
decode [adpcm32/adpcm16]
Description
Decode is a filter that converts ADPCM16 or ADPCM32 files to PCM64 files.
Warning
Coding headers should be stripped (using the stripdhr command) before
running decode.
See Also
addhdr
codetype
encode
striphdr