hsc3-0.11: Help/UGen/Envelope/envTriangle.help.lhs
> Sound.SC3.UGen.Help.viewSC3Help "Env.*triangle"
> :t envTriangle
> import Sound.SC3
> let {t = envTriangle 1 0.1
> ;e = envGen KR 1 1 0 1 RemoveSynth t}
> in audition (out 0 (sinOsc AR 440 0 * e))