envTrapezoid :: UGen -> UGen -> UGen -> UGen -> [UGen]

Trapezoidal envelope data.

> import Sound.SC3

> let { t = envTrapezoid 0.05 0.95 3 0.1
>     ; e = envGen KR 1 1 0 1 RemoveSynth t }
> in audition (out 0 (sinOsc AR 440 0 * e))