At the very beginning of a sound file is the "SAMP" header. This is used
to determine if the disk file is indeed a SAMP sound file. It's attributes
are as follows:

    #define ID_SAMP MakeID('S','A','M','P')

In assembly, this looks like:

    CNOP 0,2  ;word-align

SAMP         dc.b  'SAMP'
sizeOfChunks dc.l  [sizes of all subsequent chunks summed]