The SDES1 format refers to the ``Sound Designer I'' format defined by Digidesign Inc in 1985 for multimedia and general audo applications. It is used for storing short monoaural sound samples. The SDES1 header is complex (1336 bytes) since it allows for associated display window information to be stored in it as well as providing facilities for specifying repeat loops. The HTK input routine for this format just picks out the following information
headerSize - size of header ie 1336 (2 byte integer)(182 byte filler)
fileSize - number of bytes of sampled data (4 byte integer)
(832 byte filler)
sampRate - sample rate in Hz (4 byte integer)
sampPeriod - sample period in microseconds (4 byte integer)
sampSize - number of bits per sample ie 16 (2 byte integer)