An apparatus for tightening a drumhead having a rim and a skin set on a drum body portion. The apparatus utilizes an annular member having a track. A fastener is also employed for holding the annular member relative to the drum body. A retainer is provided and includes a surface for engaging the rim of the drumhead with at least one projection which engages the track of the annular member. The retainer is capable of rotating to move the projection along the track to loosen or tighten the skin of the drumhead through contact with the drum body.


> System and method for musical sonification of data

~ 00302