Last updated: 2 November 2026
1. Acceptance
By using deepsonicecho.com you agree to these terms. If you do not agree, please do not use the site. The site is run by Deep Sonic Echo (pen name), a private individual in Finland.
2. What the site provides
The site presents the music and books of Deep Sonic Echo, essays about value investing and the economy, and free calculators. Everything is provided for information, education and enjoyment. Nothing on the site is financial, investment, tax, legal or medical advice; see the disclaimer.
3. Using the calculators
When you use the calculators, you agree that:
- you are responsible for checking that a calculation suits your own situation;
- results depend entirely on the inputs and assumptions you choose;
- projections of returns, growth or interest are estimates, and past results do not guarantee future ones;
- you make your own decisions and take responsibility for them.
Please do not try to disrupt the site, scrape it at scale, or use it for anything unlawful.
4. Intellectual property
The songs, lyrics, book texts and excerpts, artwork, essays, page design and original code on this site belong to Deep Sonic Echo unless stated otherwise. You may use the calculators freely for personal, educational or work purposes, and quote short excerpts with a credit and a link to deepsonicecho.com. You may not republish substantial parts of the content, present it as your own, or copy the calculators into another website or app without written permission.
5. No warranty
I test the calculators carefully, but the site is provided "as is", without any warranty that it is error-free, complete or always available. If you find an error, please report it to contact@deepsonicecho.com.
6. Limitation of liability
To the extent allowed by law, Deep Sonic Echo is not liable for any loss or damage arising from the use of, or inability to use, this site or its content, including decisions made on the basis of a calculation. Nothing in these terms limits rights that consumers have under mandatory law.
7. Links and affiliate links
The site links to other websites. Links to the book on Amazon are affiliate links: as an Amazon Associate, Deep Sonic Echo earns from qualifying purchases. A link is not an endorsement, and I am not responsible for the content of other sites.
8. Changes
These terms may be updated from time to time. The date at the top shows the latest version.
9. Governing law
These terms are governed by Finnish law.
10. Contact
Questions about these terms: contact@deepsonicecho.com.