Set one of the fields of the Sound module IOMap structure to a new value. You provide the offset into the Sound module IOMap structure where you want to write the value along with a variable containing the new value.
Parameters:
_offset
The number of bytes offset from the start of the Sound module IOMap structure where the new value should be written. See Sound module IOMAP offsets.
_n
A variable containing the new value to write to the Sound module IOMap.