Description

Macros are textual replacements which are made in the orchestra as it is being read. The orchestra macro system in Csound is a very simple one, and uses the characters # and $ to define and call macros. This can save typing, and can lead to a coherent structure and consistent style. This is similar to, but independent of, the macro system in the score language.

If the specified macro is not defined then #ifndef can incorporate text into an orchestra upto the next #end.

Syntax

#ifndef NAME

....

#else 

....

#end 

Performance

Note that the #ifndef can be nested, like in the C preprocessor language.

Examples

Here is a simple example of the conditional.

          #define final ##
          instr 1
          #ifndef final
          print "calling oscil"
          #end
          a1   oscil 32000,440,1
          out  a1
        endin

See Also

#define, $NAME, #ifdef, #include, #undef

Credits

New in Csound5 (and 4.23f13)