The wireless MIDI controller designed for this master's thesis project encompasses a user interface consisting of buttons and knobs, a graphical user interface (GUI) displayed on an LCD screen, a battery power supply, and Bluetooth capability for seamless integration with a Digital Audio Workstation (DAW). During the implementation of the wireless MIDI controller, several challenges were encountered. One significant challenge was the implementation of a Real-Time Operating System (RTOS). By utilizing an RTOS, the system could effectively schedule and execute multiple tasks, enabling parallel execution and efficient task management. This approach proved superior to sequential programming as it facilitated the coordination of various controller functionalities, ensuring real-time responsiveness and smooth operation. Another noteworthy challenge was the implementation of Bluetooth connectivity. Establishing a reliable and low-latency connection between the MIDI controller and the DAW required the adoption of a robust Bluetooth communication protocol. Overcoming the complexities of establishing a stable Bluetooth link, handling data transmission, and ensuring compatibility with different DAWs were critical aspects of the implementation process. The design of the power supply for the wireless MIDI controller involved several subsystems, including Low-Dropout (LDO) regulator, boost regulator, battery charging and protection circuit, and battery status monitoring. Achieving an efficient power supply system necessitated careful consideration of power requirements, voltage regulation, charging algorithms, and circuit protection mechanisms. Overcoming potential difficulties during the implementation of these subsystems was crucial to ensuring reliable and safe operation of the MIDI controller. The realization of this project holds significant potential as it imitates digital version of classical theremin instrument which is far more superior to his analog ancestor including playability and virtually unlimited sounds selection. This MIDI controller offers musicians and producers the freedom to control their DAWs wirelessly, enhancing their creative workflow and enabling expressive performances. The integration of an intuitive user interface, graphical feedback, and versatile connectivity options contributes to a more immersive and efficient music production experience. By addressing these challenges and optimizing the design, this project contributes to the advancement of music technology, empowering musicians to explore new realms of creativity in their music production endeavors.