when reading in an SMF, would you search for track 2 or would you
count on the lenght info in the header of track 1?
_can one count on the lenght info of tracks or are there files with
wrong or missing lenght info?
is the lenght info of an MTrk header working like the header of the
header, i.e. does it describe the lenght behind/without the header
of the track? (like the header of the header is always 6 bytes long)