The invention relates to a drum and to a device (1) therefor, having a system (3) for altering the attack and decay behavior, in particular the note length of the drum (2). The aim of the invention is to provide a device for a drum and a drum having such a device, which can alter the attack and decay behavior quickly and with little effort, and in particular enables setting of the note length and also of the timbre of the drum largely independently of the pitch. This aim is achieved in that the system (3) is fastened to the drum (100, 2) and has a clip (5) on which an adjustable connecting element (6) is arranged, which is designed for a connection to a support arm or to a base support (7).