Silent create a UGen which always outputs zero 

Silent.ar(in)

This UGen simply outputs zero

numChannels - Number of channels of silence to endure

//silence is golden

{Silent.ar}.play

//multichannel silence; the perfect electroacoustic work? 

{Silent.ar(8)}.play

//now with offset

{Silent.ar + 0.5 }.play;

//For these examples, you might want to boot the internal server

Server.default =s = Server.internal;

s.boot; 

s.scope