Contrabass/ˈkɑːntrəbeɪs/ Definition 1 of 3Pro Tip 1/3Orchestra Role The contrabass provides the foundation for harmony and rhythm in orchestral music. The contrabass section really sets the rhythm for this symphony. Pro Tip 2/3Size and Stature The contrabass is the largest and lowest-pitched instrument in the string family. You'll recognize the contrabass by its grand size on stage. Pro Tip 3/3Playing Technique Players often use a bow or pluck the strings with their fingers. She plucked the strings of the contrabass skillfully.