f C2 (see below for pitches), about 8287 bytes of
          sample data are sent to the channel per second. Multiply the
          rate by the twelfth root of 2 (=1.0595) for each semitone
          increase in pitch eg. moving the pitch up 1 octave doubles the
          rate. The data is stored in the order it is played (eg. first
          byte is first byte played). The first word of the sample data
          is used to hold repeat information, and will overwrite any
          sample data that is there (