> Sound.SC3.UGen.Help.viewSC3Help "Changed"
    > Sound.SC3.UGen.DB.ugenSummary "Changed"

> import Sound.SC3 {- hsc3 -}

simple composition of hpz1 and >*

> g_01 =
>     let s = lfNoise0 'α' KR 2
>         c = changed s 0
>         c' = decay2 c 0.01 0.5
>     in sinOsc AR (440 + mce2 s c' * 440) 0 * 0.1

sinOsc is constantly changing...

> g_02 =
>   let s = sinOsc AR 440 0
>       c = changed s 0
>   in s * c * 0.2