I wonder: if you got, say, a length of PVC pipe and played it like a didgeridoo, would this be bound by the same rules?

I'm not qualified spiritually to speak on this, but I think that this should actually be "kosher" - since the PVC didg would lack some of the manufacturing processes like burning the inside and bees waxing and etc A -- to not make it a "true" didg but rather an instrument that sounds like one