Accessibility Statement

Our Commitment to Accessibility

OnlinePitchDetector.com is committed to making its content and tools as accessible as possible to all users, including people with disabilities. Vincent Sullivan designs and maintains this site with accessibility as a baseline requirement, not a secondary concern.

This statement documents the current conformance level of OnlinePitchDetector.com, what has been implemented to support accessible use, where genuine limitations exist due to the audio-dependent nature of the primary tool, and how to report accessibility problems.

Conformance Status

OnlinePitchDetector.com is partially conformant with the Web Content Accessibility Guidelines (WCAG) 2.1 Level AA.

Partial conformance means the majority of site content and functionality meets WCAG 2.1 Level AA standards, but the Online Pitch Detector has an inherent audio dependency that creates accessibility limitations for users who are deaf or hard of hearing. These limitations are documented honestly in the Known Limitations section below.

All text-based content on this site — educational articles, explainers, FAQs, and legal pages — meets WCAG 2.1 Level AA standards fully.

What We Have Implemented

Keyboard Navigation All interactive elements on this site — buttons, links, form fields, and the pitch detector controls — are fully operable via keyboard alone. Tab order follows a logical reading sequence. No keyboard traps exist anywhere on the site.

Colour Contrast All text content meets the WCAG 2.1 Level AA minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Contrast ratios have been verified using the WebAIM Contrast Checker against all colour combinations used on the site, including the pitch display and cents deviation indicator.

Alternative Text All meaningful images on OnlinePitchDetector.com include descriptive alt text. Decorative images use empty alt attributes (alt="") so screen readers skip them without redundant announcements.

Skip Navigation Link A skip-to-main-content link is present at the top of every page, allowing keyboard and screen reader users to bypass the site header and navigation.

Responsive Design All pages are fully responsive and function correctly at viewport widths from 320 px upward. No content requires horizontal scrolling at standard zoom levels.

No Autoplay Audio or Video No audio or video content plays automatically. The pitch detector activates the microphone only when explicitly initiated by the user. No background audio or autoplaying media exists on any page.

Readable Typography Body text is set in a legible sans-serif typeface at a base size of at least 16 px. Line spacing meets WCAG 1.4.12 Text Spacing. Users can increase text size up to 200% using browser zoom without loss of content or functionality.

Focus Indicators Visible focus indicators are present on all interactive elements.

Form Labels All form fields — including the contact form — have programmatically associated labels.

Screen Reader Compatible Output The Hz value, note name, and cents deviation displayed by the pitch detector are rendered as standard HTML text and are fully readable by screen readers. Static results are announced correctly. Rapidly updating live values are subject to the ARIA live region limitation noted below.

Known Limitations

The Online Pitch Detector requires the ability to produce sound to use meaningfully. The tool measures the fundamental frequency of a sound captured through your microphone. A user who is deaf or hard of hearing cannot use auditory feedback to monitor their own pitch production, sustain a tone at a consistent frequency, or verify whether the reading reflects their intended pitch. The result is displayed as text and is screen-reader accessible, but the input process depends on producing and self-monitoring a pitched sound.

Real-time display and screen reader announcement. The Hz, note name, and cents deviation values update in real time at approximately 20–30 frames per second. Static final values are fully readable by screen readers. Rapidly updating live values may not be announced by screen readers in a timely or useful way due to the rate of change and ARIA live region behaviour with high-frequency updates. This is flagged as a known limitation and documented as a work in progress.

Fully Accessible Features

The following content on OnlinePitchDetector.com is fully accessible regardless of hearing ability:

  • All educational articles and explainers on pitch detection science
  • The How It Works page — complete text documentation of the YIN detection pipeline
  • The FAQ — all questions and answers in standard readable text
  • All legal pages
  • The Contact page and contact form
  • All site navigation

Testing and Verification

Accessibility testing on OnlinePitchDetector.com has been conducted using:

  • NVDA + Chrome on Windows 11 — keyboard navigation, screen reader announcement of page content and pitch detection results
  • VoiceOver + Safari on macOS — keyboard navigation, screen reader announcement, focus management
  • VoiceOver + Safari on iOS — touch navigation, zoom, screen reader announcement on mobile

Testing is reviewed annually and after any significant site update. The most recent accessibility review was completed in June 2026.

Feedback and Contact

If you experience an accessibility barrier on OnlinePitchDetector.com — or if any part of this site is difficult to use because of a disability — please contact Vincent Sullivan directly.

Email: contact@onlinepitchdetector.com Subject line: Accessibility Feedback Response time: Within 7 business days

Related Pages

Annual Review Schedule

This Accessibility Statement is reviewed and updated annually. The next scheduled review is June 2027.

Written by Vincent Sullivan, founder of OnlinePitchDetector.com. Last updated: June 2026.

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