This is involved with the lookup table The syntax is
f number loadtime table-size GEN-Routine p1 ... pn ; comment
for example a 16 point sinewave is
f number loadtime tsize gen ps f 111 16 10 1 ; A Sine wave
This get takes 16 equidistant points on a sine wave and by doing so it makes a discrete sine wave.
This allows you to insert silence into the composition
:__csound: