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All content presented on this website — in particular texts, graphics, logos, algorithms and source code — is protected by the respective rights (copyright, trademark rights). Any use, reproduction or distribution is subject to our rights or the rights of the respective authors or rights administrators.
Theoretical foundations. The scale positions used in ModusCycler and modes·explorer follow the finger-string system according to the systematics of Bernd Kiltz (berndkiltz.com). A detailed list of sources — including standard works by Frank Sikora and Mark Levine — can be found on the home page in the “Sources” section. The system is named with the express permission of Bernd Kiltz; no further rights to his name or his materials are derived from this, and there is no endorsement. I am a student of his courses myself.
Song database. The song database that can optionally be used in the ModusCycler app is based on public sources: McGill Billboard Project (CC0) and Rolling Stone lists (CC-BY 4.0).
All logos, graphics and audio examples on moduscycler.com, app.moduscycler.com and explorer.moduscycler.com are our own works (© Robert Seidel) or part of the licensed content mentioned above. The piano samples were produced in-house.
This website uses the fonts DM Serif Display, DM Mono and Instrument Sans. They are provided via Bunny Fonts (BunnyWay d.o.o., Slovenia, EU) — a GDPR-compliant replacement for Google Fonts which, according to the provider, does not store IP addresses.
The website and the associated web apps are delivered via Vercel Inc. (340 S Lemon Ave #4133, Walnut, CA 91789, USA). A data processing agreement (DPA) pursuant to Art. 28 GDPR is in place with Vercel. For details on data processing and third-country transfers, see the privacy policy.
Liability for content. As a service provider we are responsible for our own content on these pages under the general laws pursuant to § 7 (1) DDG. However, pursuant to §§ 8 to 10 DDG we are not obliged as a service provider to monitor transmitted or stored third-party information or to investigate circumstances that indicate illegal activity.
Liability for links. Our offering contains links to external third-party websites over whose content we have no influence. We therefore cannot accept any liability for this third-party content. The respective provider or operator of the linked pages is always responsible for their content.
Responsibility for content. All explanations, examples and recommendations on this website reflect my personal musical view and experience. They replace neither lessons nor a complete music theory education.
The European Commission provides a platform for online dispute resolution (ODR): https://ec.europa.eu/consumers/odr/. We are neither obliged nor willing to participate in dispute resolution proceedings before a consumer arbitration board.