Control device for controlling a sound of an electric musical instrument, the control device comprising: a tread plate which is arranged to be rotatable about a first axis and is arranged to be rotatable about a second axis; a signal generator which is configured such that it generates a first electric signal to control the sound and a second electric signal to control the sound, wherein the first electric signal is based on a rotation of the tread plate about the first axis and the second electric signal is based on a rotation of the tread plate about the second axis; a support surface; and a bearing which connects the tread plate to the support surface so that the tread plate is rotatable about the first axis and about the second axis, wherein the first axis and the second axis each extend parallel to the tread plate, wherein the first axis and the second axis are arranged perpendicular to one another, characterized in that i) the bearing comprises a first articulation and a second articulation, wherein the first articulation is configured such that the tread plate is arranged to be rotatable about the first axis, and wherein the second articulation is configured such that the tread plate is arranged to be rotatable about the axis, or ii) the bearing comprises a Cardan suspension with a first rotary bearing and a second rotary bearing, wherein the first rotary bearing is configured such that the tread plate is arranged to be rotatable about the first axis, and the second rotary bearing is configured such that the tread plate is arranged to be rotatable about the second axis. a tread plate which is arranged to be rotatable about a first axis and is arranged to be rotatable about a second axis; a signal generator which is configured such that it generates a first electric signal to control the sound and a second electric signal to control the sound, wherein the first electric signal is based on a rotation of the tread plate about the first axis and the second electric signal is based on a rotation of the tread plate about the second axis; a support surface; and a bearing which connects the tread plate to the support surface so that the tread plate is rotatable about the first axis and about the second axis, wherein the first axis and the second axis each extend parallel to the tread plate, wherein the first axis and the second axis are arranged perpendicular to one another, characterized in that i) the bearing comprises a first articulation and a second articulation, wherein the first articulation is configured such that the tread plate is arranged to be rotatable about the first axis, and wherein the second articulation is configured such that the tread plate is arranged to be rotatable about the axis, or ii) the bearing comprises a Cardan suspension with a first rotary bearing and a second rotary bearing, wherein the first rotary bearing is configured such that the tread plate is arranged to be rotatable about the first axis, and the second rotary bearing is configured such that the tread plate is arranged to be rotatable about the second axis. i) the bearing comprises a first articulation and a second articulation, wherein the first articulation is configured such that the tread plate is arranged to be rotatable about the first axis, and wherein the second articulation is configured such that the tread plate is arranged to be rotatable about the axis, or ii) the bearing comprises a Cardan suspension with a first rotary bearing and a second rotary bearing, wherein the first rotary bearing is configured such that the tread plate is arranged to be rotatable about the first axis, and the second rotary bearing is configured such that the tread plate is arranged to be rotatable about the second axis.