Accessibility

Effective 8 October 2026. Last updated 8 October 2026.

Eigentone aims to meet the Web Content Accessibility Guidelines (WCAG) 2.2 at level AA. This statement says what that means on this page, how it is checked, and where the page still falls short.

What the page does

• Every drawing has a text equivalent. The frequency line is summarised in four sentences under it (the worst pile-up, Bonello's check, the widest gap, the Schroeder frequency), and every mode it draws is listed in a table. The floor plan's label states where the picked mode booms and where it vanishes, and the same two sentences sit beside it.
• Everything works from the keyboard. The frequency line takes the left and right arrow keys, Home and End to pick a mode; the mode list beside the plan is a standard select; the tone starts and stops with Enter or Space, and Escape stops it from anywhere on the page.
• Colour is never the only signal. Axial, tangential and oblique modes differ by stem height and head shape as well as tone; a band whose count falls carries a notch and a magenta rule; the plan's quiet lines are dashed and labelled with their distance from the walls.
• Text contrast is at least 4.5 to 1 against its background, and the drawings' lines at least 3 to 1. Fields are labelled, errors name the field and the accepted range, and inputs are 16 pixels or larger so phones do not zoom.
• Nothing on the page animates. The tone starts only when you press the button, is capped in level, shows a stop control fixed to the bottom of the screen while it plays, and stops by itself after 60 seconds or when the page is hidden.

How it is checked

Each release is checked against the live page with automated tools for contrast, landmarks, labels, keyboard reach and touch-target size at phone, tablet and desktop widths, and the results are recorded in the build's delivery notes in the source repository. Automated checks catch a share of problems, not all of them.

Known limits

• The frequency line and the plan are drawings on a canvas. A screen reader reads their labels and the text beside them, not the drawings themselves.
• The tone is a sound. Its information (the frequency) is always shown as text as well; the sound adds nothing that the text does not say.
• The page has not been tested by people using assistive technology. If something does not work for you, we want to know.

Contact

PaintedApp, LLC: support@painted.app. Tell us the page, what you were trying to do and what got in the way, and we will reply.