add.help.lhs

> Sound.SC3.UGen.Help.viewSC3Help "Operator.+"
> :t (+)

> import Sound.SC3.ID

> let { o = fSinOsc AR 800 0
>     ; n = pinkNoise 'a' AR }
> in audition (out 0 ((o + n) * 0.1))

DC offset.
> audition (out 0 ((fSinOsc AR 440 0 * 0.1) + 0.5))