This class is missing documentation.
InGrainIBF.ar(trigger: 0, dur: 1, in, envbuf1, envbuf2, ifac: 0.5, azimuth: 0, elevation: 0, rho: 1, wComp: 0, mul: 1, add: 0)
.init( ... theInputs)
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link::Classes/InGrainIBF::