class:: TRand summary:: Triggered random number generator. related:: Classes/ExpRand, Classes/IRand, Classes/LinRand, Classes/NRand, Classes/Rand, Classes/TExpRand, Classes/TIRand categories:: UGens>Random, UGens>Triggers Description:: Generates a random float value in uniform distribution from code::lo:: to code::hi:: each time the trigger signal changes from nonpositive to positive values. classmethods:: method::ar, kr argument::lo Lower limit of the output range. argument::hi Upper limit of the output range. argument::trig The trigger. Trigger can be any signal. A trigger happens when the signal changes from non-positive to positive. Examples:: code:: ( { var trig = Dust.kr(10); SinOsc.ar( TRand.kr(300, 3000, trig) ) * 0.1 }.play; ) ( { var trig = Dust.ar(MouseX.kr(1, 8000, 1)); SinOsc.ar( TRand.ar(300, 3000, trig) ) * 0.1 }.play; ) ::