On my life!

          sketch6.midi           sketch6.pdf           sketch6-sheet.pdf           sketch6.mp3
              Refer files;    sketch6.ly     sketch6-sheet.latex     run--lily.cmd      run--lily.sh
              Actual files Download; sketch6.tar.gz ( About; 33,750bytes )
       Windows (cmd)>run--lily sketch6[Enter]      Linux (bash)$ ./run--lily.sh sketch6[Enter]

This sounds "sketch6.mp3".