By using this site, you agree to these Terms of use.
About the service
This site provides free tools and reference content related to music theory and fretted instruments.
You do not need to create an account to use the tool.
Availability and accuracy
The site and its content are provided as-is and may contain errors, defects, or temporary unavailability.
Although care is taken in implementing the calculations and presenting the content, there is no guarantee that all information will always be complete, correct, or suitable for a particular purpose.
If you find an error, you can report it through the contact page.
Content and intellectual property
General concepts of music theory, scales, chords, and widely known systems are not the exclusive property of this site.
The text, interface elements, visual identity, and other original content published on the site are protected by applicable law and belong to their respective rights holders.
Diagrams generated by the tool may be used for study, teaching, and personal use, including in educational materials, provided they are not presented as part of a complete copy or reproduction of the site itself.
Acceptable use
You may access and use the site normally for personal, educational, and professional purposes.
You may not use the site in a way that harms its availability, security, or operation, including through automation or excessive-volume requests.
You may not present the site’s original content as your own work.
External services
The support action opens an external Stripe-hosted checkout. The site does not display product recommendations or affiliate links. The site is not responsible for the products, services, policies, or content of third parties accessed through external services.
Contributions
The site may offer an option to make a voluntary financial contribution to support its maintenance and development. The panel presents four options per locale: BRL 5, BRL 10, BRL 20, and a custom amount in Portuguese; USD 2, USD 5, USD 10, and a custom amount in English.
Contributions are not required to use the tool and do not grant access to additional features, content, or services.
Each option is an ordinary outbound link to a Stripe-hosted checkout. Payments are processed by Stripe and are subject to the payment provider’s applicable terms. A contribution is not a charitable donation, is not tax-deductible by virtue of this site, and does not grant access to additional features, content, or services. This site does not receive or store full card details.
Privacy
Information processing and browser storage are described in the privacy policy and cookie policy.
Limitation of liability
To the extent permitted by applicable law, the site operator is not liable for damages arising from use of, inability to use, or reliance on information made available by the site.
Nothing in these Terms limits rights that cannot be excluded under applicable law.
Governing law
These Terms of use are governed by the laws of the Federative Republic of Brazil.
Changes
These Terms may be updated when there are changes to the site, the services offered, or the applicable conditions.
The date shown at the beginning of the page indicates when it was last updated.