Terms of use
Last updated: 30 September 2026
This English translation is provided for convenience. If it differs from the Chinese original, the Chinese original prevails.
What this site provides
This site provides course articles, animations, audio and interactive labs free of charge; anyone can read and use them. Reading and using the labs require no sign-in; once signed in, you can post comments.
Permitted use
You are welcome to read, quote and share links. Please do not copy the content of this site and republish it as your own course, or use it for sale.
Intellectual property
The original Chinese text, original figures, interaction design and newly written code belong to their respective rights holders. Third-party content remains under its own licence; see Copyright and third-party licences.
Comments
Once signed in, you can post comments at the bottom of a page. Comments are public, so please keep the discussion on topic and do not post advertising, harassment, illegal content or other people’s personal information. The operator may delete comments that break these rules, and you can delete your own comments at any time.
Operator and contact
Brand: Ethan Music Lab (Ethan 音乐实验室); creator: Ethan BAI; location: Japan; contact email: hello@ethanmusiclab.com.
Governing law and disputes
These terms are governed by the laws of Japan, without excluding any mandatory consumer protection rules that must apply under the law of the consumer’s place of residence. In the event of a dispute, both parties shall first try to resolve it through the email address above; if that fails, it shall be handled by the court that has jurisdiction under Japanese law.