SingingRangeTest.com publishes browser-based singing tools, vocal education articles and singer vocal-range research. This page explains how that content is researched, sourced, updated and corrected, so you can judge how far to rely on it. Last updated: [OWNER TO CONFIRM: date of publishing].
Our aim is to be useful, accurate and honest about uncertainty, and to keep three things apart: what a tool measures, what a source documents, and what is interpretation or opinion.
Our Editorial Principles
- Accuracy: factual, numerical and technical claims should trace to evidence we can name.
- Usefulness: each page should answer a real question, help you use a tool, or help you read a result.
- Transparency: uncertainty, disputed figures and limits are stated, not hidden.
- Originality: pages should add something: a tool, a comparison of sources, a clearer explanation.
- Accountability: errors can be reported, reviewed and corrected in public.
- Independence: commercial relationships do not decide factual conclusions.
How We Decide What to Publish
We use Google Search Console data to see which questions people type into search and which of our pages they reach. That shows us where an article is missing, unclear or out of date, and which parts of a page readers most likely came for. Search data tells us what people want to know. It is never used as evidence that a fact is true.
Source Hierarchy
Sources are not equal, and the right source depends on the claim. When sources disagree, we rank them roughly in this order:
- Primary and official sources: Guinness World Records for records, an artist’s own statements and interviews, official recordings and documented live performances, and official technical documentation.
- Published studies and reference works: peer-reviewed research, university publications, established textbooks and recognised professional bodies. These carry the most weight for anatomy, acoustics and voice science.
- Wikipedia, only through its citations: we use it as a pointer, and rely on it for a note or range only where it cites sheet music, a transcription or another source we can check. We follow the citation, not the article.
- Reputable secondary sources: established music publications, credible biographies and specialist analysis, especially those that explain their evidence.
- Leads only: fan sites, forums, social posts, user-submitted claims and unsourced vocal-range databases. They can show us a claim worth checking. They are not enough on their own.
We do not treat copied SEO articles, anonymous content-farm pages, unsourced numbers, or AI-generated text as evidence. AI output is never a source.
How Vocal Range Figures Are Labelled
Voice-type ranges and singer ranges are conventions and estimates, not fixed biological facts. Different books and websites give different limits for the same voice type, so we label what kind of figure we are giving:
| Label | What it means on our pages |
|---|---|
| Commonly cited | A range that several sources repeat, but that is not tied to one verifiable measurement. Shown with the spread when sources differ. |
| Estimated | A range we or a source worked out from recordings, sheet music or transcriptions, with the uncertainty stated. |
| Documented | A specific note that can be identified in a named recording or performance, or is recognised by an official record-keeper. |
| Measured by a tool | A reading from one of our tools on your own voice, on one day, with your microphone and room. It is an estimate for you, not a published fact about anyone else. |
Notes are written in scientific pitch notation, where C4 is middle C. Where a page compares figures from several sources, it says which convention it uses. For how voice types are grouped, see our voice types guide.
How Celebrity Vocal Range Claims Are Handled
Published singer ranges often conflict. Sites may mix studio recordings, live shows, falsetto, backing vocals and effects, and some repeat a figure that no one has traced back. So we do not copy a range from another site. For each singer on pages such as our famous singer vocal ranges list, we work through the following:
- Find the evidence. An identifiable note in an official recording, a documented performance, a primary interview, a published study, or sheet music.
- Verify the note. A clear note in a reliable recording shows that the singer can produce it. It does not show that the note is part of their everyday range.
- Separate extremes from working range. One very high or low note does not define a range. We say “documented note” for extremes and “commonly cited range” or “estimated range” for the typical span.
- Treat voice type as a separate question. Classification is subjective for contemporary singers. We use wording such as “often described as” and say when it is debated.
- Show disagreement. If credible sources conflict, the page shows the spread and does not force one exact figure. Where a claim cannot be supported, we qualify it or leave it out.
How Tools and Tool Pages Are Reviewed
A tool page describes what the tool’s code actually does: its inputs, thresholds, formulas and limits. A page should not say a tool “measures” something it only estimates, and we keep four steps apart: detecting a frequency, naming the nearest note, working out a range from held notes, and suggesting a voice type from that range.
What has been checked, stated plainly: for the tools that have their own pages, the code was reviewed and makes no network or recording calls, so audio is analysed in your browser. Behaviour was checked with automated tests using synthetic signals, a simulated microphone and simulated browsers. Not yet tested: real singers’ voices and microphones, Safari, Firefox, phones, or a full WordPress install. We publish no accuracy percentages that a test does not support. The details are in our testing methodology and on accuracy and limitations.
AI Assistance
AI output is not evidence and is never presented as human expertise or as a source. Every factual claim must trace to a source we can name, whatever tool helped draft the wording.
[OWNER TO CONFIRM: how AI assistance is used in research, drafting and editing, and who reviews content before it is published. Replace this line with an accurate, first-person statement before publishing.]
Vocal Health and Medical Content
We provide educational information, not medical diagnosis or treatment. We avoid diagnosing conditions and avoid guaranteeing recovery or improvement. Please do not force painful or uncomfortable notes to raise a test result, and see a qualified professional if hoarseness, pain or strain persists. Our vocal health tips and the limits described in accuracy and limitations give more detail.
Editorial Independence and Commercial Relationships
SingingRangeTest.com is independently operated. The site may use advertising, affiliate links or sponsorships. These do not decide tool results, singer ranges, voice classifications or factual conclusions, and we do not change a conclusion because an advertiser, artist or product provider would prefer another. Where a commercial relationship affects a recommendation, we aim to disclose it on that page.
Corrections
If you spot an incorrect note or range, an unsupported claim, a broken tool or link, or outdated information, please tell us through the contact page and include a source if you have one. We review the evidence, and if the error is confirmed we correct the page. We do not keep a known error to avoid changing published content.
A visible correction note is added when a change affects the meaning or conclusion of a page, for example a singer’s documented range, a voice classification, an important scientific claim, methodology, a statement about tool accuracy, or safety guidance. Spelling, formatting and broken-link fixes do not get a formal note. Material corrections are recorded below.
Corrections log
| Date | Page | What was wrong | What changed | Source or reporter |
|---|---|---|---|---|
Entries are added here when a correction changes what a page says.
How and When Content Is Updated
- Pages are reviewed when a tool changes, stronger evidence appears, an error is reported, or search data shows a page no longer answers the question people ask.
- A meaningful update means the substance was reviewed or changed. Changing a visible “last updated” date without that review is not an update.
- When a tool is rebuilt or changed, its page and the methodology pages are updated to match.
What We Do Not Publish
- copied or scraped content;
- fabricated sources, invented credentials or fake quotations;
- false testimonials or invented test results;
- singer-range claims without evidence;
- AI output presented as evidence or as human expertise;
- guaranteed vocal-health outcomes or medical diagnoses;
- pages made by swapping names or numbers inside a template.
Who Is Responsible
SingingRangeTest.com is created and maintained by Sam Cooke, who is responsible for its content, tool documentation, updates and corrections. Read more on the author page and about us. To see how the tools work in practice, start with how it works, or browse the full list of singing tools.
You can also follow SingingRangeTest.com on Facebook.
Page last reviewed: .