Worked on the mixxxdj/mixxx repository to enhance audio scratching functionality by implementing FramePos-based seek position handling within the PositionScratchController. This feature involved refactoring the existing approach from using raw sample positions to leveraging FramePos, which improved both the precision and usability of audio position control during scratching. The work required a strong command of C++ development, audio processing techniques, and object-oriented programming principles. By focusing on code quality and maintainability, the changes contributed to a more robust and user-friendly audio manipulation experience, addressing the technical need for finer control in digital DJ applications without introducing new bugs during the development period.