Developed a command-line utility for the csound/csound repository that converts MIDI files from the SMF0 format to SMF1, introducing per-channel selection through a channel mask. This tool groups MIDI events by channel and writes them into separate SMF1 tracks, enabling targeted channel output and streamlining downstream processing. The implementation focused on C and leveraged skills in data structures, file I/O, and system programming to enhance automation and reduce manual file handling in MIDI workflows. By addressing issue 1414, the work improved compatibility with existing MIDI processing pipelines and contributed a new feature without introducing any bug fixes during the period.