To soundproof your basement ceiling, add fiberglass batts and not using a vapor barrier involving the joists. Then, fasten 1 or 2 levels of drywall to them working with resilient clips and metallic furring channels (hat channels). Some rooms may demand huge windows, identified as “egress” windows, for fire protection. https://newhomeconstructiontwinci43085.ezblogz.com/66670156/the-ultimate-guide-to-basement-finishing