I knew right away that I wanted to work with percussion, and also incorporate some elements of pitch bending into my instrument. There are two main ways to bend the pitch of a drum: stretching the membrane of the drum head, or changing the volume of the drum. After comparing the options and the mechanical difficulty of each option, I decided to work with volume (space inside drum, not sound volume). To get the most out of the pitch bending aspects of my drum, the instrument will need to have a lot of sustain. I will support this by choosing metal as a material (ringing quality) and putting loose rivets in the top (rattle that adds new texture as well as sustain).