form 8svx stores all the waveform data in one body chunk "body".  it
stores playback parameters in the required header chunk "vhdr".  "vhdr"
and any optional property chunks "name", "(c) ", and "auth" must all
appear before the BODY chunk.  Any of these properties may be shared over
a LIST of FORMs 8SVX by putting them in a PROP 8SVX.  [See "ea iff 85"
Standard for Interchange Format Files.]

 background 
 required property vhdr 
 optional text chunks 
 optional data chunks atak and rlse 
 data chunk body 
 other chunks