We're doing a production of "Ragtime" in which we're putting the orchestra upstage of the scenery so we can leave the pit covered and bring the singers/dancers cloesr to the audience. I need to hang a drop downstage of the orchestra (upstage of the set) that I can front-project onto, as well as hitting it with some cyc lights. Does anyone have a recommendation for a fabric to use that is visually opaque (projections won't bleed through onto the orchestra and orchestra lights won't visibly show through the drop to the audience) but acoustically transparent. I don't have the equipment or rental budget to fully mic the orchestra, so I need the live feed in the house. Thanks!