Did you forget?

          sketch4b.mid           sketch4b.pdf           sketch4b-sheet.pdf           sketch4b.mp3

This sounds "sketch4b.mp3" and Please click! music plays.
[picture of music]

[picture of music]

Source code
sketch4b.ly(html)    sketch4b-sheet.latex(html)    run-svg-pdf.cmd(html)
All download files(Includes all files that are listed here[of course, MP3]) -------------->>; sketch4b.tar.gz(About;<7.5Mbytes)
    and     >tar xvfz sketch4b.tar.gz =====> sketch4b/*.*(Files and Directory)

usally;(cmd prompt)   sketch4b>lilypond --png --pdf sketch4b.ly[Enter]

script-run;(cmd prompt)   sketch4b>run-svg-pdf sketch4b[Enter]  You can get "All svg,pdf-files" in sketch4b/svg/
  sketch4b>run-svg-pdf sketch4b[Enter]  •••• And displays the sketch4b(here the same as).
(However, this "Windows8(& UP) + LilyPond(ver2.18) + W32TeX(& UP) + Ghostscript(ver9.06 & UP)" is required.)