A system of removing undesirable overtones and rings in an acoustic drum includes a drum, a tuning port, and an attachment mechanism. The tuning port is attached to the drum by the attachment mechanism, and three different attachment mechanisms are used within the system to attach the tuning port. A plurality of dimples is positioned on the inner surface of the tuning port, and the tuning port includes a first, second, and third alternative embodiments. The first alternative embodiment, which has a flared end and a cylindrical end, can be attached with a drum shell of the drum by the first and second attachment mechanisms. The second alternative embodiment, which has two flared ends, can be attached with the drum shell by the first and second attachment mechanisms. The third alternative embodiment, which has two flared ends, can be attached with the drum shell by the third attachment mechanism.