OK, my workshop construction, outside of needing more cabinets, is mostly done. Woohoo!!!! Only took a year.

I've gone to great lengths soundproofing it from the house (Double 5/8" drywall, Rockwool Mineral Wood Batt insulation, and Green Glue between layers of drywall). The elephant in the room, is the old Sears Craftsman (>30yo) air compressor that I mostly use for the Grizzly G0445 24" wide belt sander, spraying away dust, etc... I very rarely use air tools. The compressor is extremely loud. Easily loudest tool in the workshop. More than the 5HP cyclone.

The specs on the Grizzly only state the compressor has to provide 75psi. Nothing about CFM.

I know California Air Tools makes quiet compressors, but will their compressors provide enough CFM for the wide belt sander? If not, which other compressors that are relatively quiet that can meet the Wide-belt's requirements?