CMIX 1 2 3 4 5 < scorefile.scocontains 5 ingeter command-line arguments. The command:
CMIX 1.0 2.0 "hey" < scorefile.scocontains 2 floating-point arguments and 1 string argument.
i_arg(n) returns the nth argument as an integer value.
s_arg(n) returns the nth argument as a string value.
n_arg(n) returns the number of arguments in the CMIX command.
Numbering of arguments starts at "0" for the first argument after the
CMIX command.