The --strset option allows setting strset string values from the command line,
in the format '--strsetN=VALUE'. It is useful for passing parameters to the
orchestra (e.g. file names).

------------------------------------------------------------------------------

ir      strtod  Sstr
ir      strtod  indx
kr      strtodk Sstr
kr      strtodk kndx
ir      strtol  Sstr
ir      strtol  indx
kr      strtolk Sstr
kr      strtolk kndx

These opcodes convert a string to a floating point (strtod) or a signed
integer (strtol) value. strtol can parse numbers in decimal, octal (prefixed
by 0), and hexadecimal (with a prefix of 0x) format.
It is also possible to pass an strset index or a string p-field from the
score instead of a string argument. Both strtod and strtol have an i-time
only version and one that runs both at initialization and performance time
(note: in the latter case, if a k-rate index variable is used, it should be
valid at i-time as well).
If the string cannot be parsed as a floating point or integer number, an
init or perf error occurs and the instrument is deactivated.


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