Sysex Track Chunk
The sysex track chunk contains data for a Track Form. It is an array of system exclusive message items, each consisting of a DMUS_IO_SYSEX_ITEM structure followed by the number of bytes specified in the dwSysExLength member.
<syex-ck> -> 'syex' (
{
<DMUS_IO_SYSEX_ITEM>
<BYTE>... // Data
}...
)