This class is missing documentation.
InGrainBBF.ar(trigger: 0, dur: 1, in, envbuf, azimuth: 0, elevation: 0, rho: 1, wComp: 0, mul: 1, add: 0)
.init( ... theInputs)
Copy and paste the text below and save to HelpSource/Classes/InGrainBBF.schelp
link::Classes/InGrainBBF::