hsc3-0.11: Help/UGen/Envelope/freeSelf.help.lhs
> Sound.SC3.UGen.Help.viewSC3Help "FreeSelf"
> Sound.SC3.UGen.DB.ugenSummary "FreeSelf"
> import Sound.SC3.ID
> let {n = dust 'a' KR 0.5
> ;a = freeSelf n
> ;b = out 0 (sinOsc AR 440 0 * 0.1)}
> in audition (mrg [a,b])