Music Class ยท Sources
Where the songs come from
Every song in Music Class is a work whose copyright term has expired. This page lists each one: who wrote it, the year, why it can be used, and which score DingSong followed.
How we decide (4 rules)
See the 4 rules
- DingSong is for people all over the world, so we use the strictest standard: the composer died in or before 1955, and the piece was published in or before 1930. That way, the copyright term has expired in Taiwan, Japan, the United States, and countries that protect works for 70 years after the author's death.
- For folk songs and old tunes with no known composer, we use the earliest published version. We don't copy later adaptations, arrangements, or simplified scores.
- All melodies are simplified versions that DingSong wrote down itself from public domain scores (mostly moved to C major or A minor). We don't use anyone else's recordings or arrangements.
- Lyrics are judged separately for each language (Chinese, English, Japanese, and the original lyrics each count on their own). If we can't find the lyricist, or the lyricist died too recently, we leave them out. Music Class shows only the melody, not the lyrics. Below, we note whether the lyrics in each language can be included, for teachers' reference.
Found a problem?
If you hold the rights to any of these songs, or find that we got a songwriter or year wrong, email us. We'll take that song down first, then look into it. This page is not legal advice.
cylab.contact@gmail.com
This page was last updated on October 26, 2026.