CSound: Global variables create helper instruments

Quick tutorial on how to make "helper" instruments in csound. Basically rather than running multiple "reverb" opcodes in various instruments, you create a "send" (like in your DAW software), and put a reverb on the send. Later you mix in whatever amount of that send you want into the "master" output.

The screenshot shows some code in QuteCSound, the comments should explain the rest of the theory of the send.