Editorial Guidelines

Last updated: 27 September 2026

Our editorial principles

• Write for readers first, not search engines
• Explain technical ideas in plain language
• Keep measurements, calculations and interpretations apart
• Separate verified information from estimates and reported claims
• State meaningful limits and uncertainty
• Never promise a vocal result or improvement
• Correct confirmed errors and update pages when better information appears

A page is not finished because it targets a keyword or reaches a certain length. It should answer the reader’s main question, give the context needed to use the answer and make its limits easy to find.

Who writes and reviews the content

Content on VocalRangeCalculator.com is researched, written, edited and reviewed by Conan Jon, who independently operates the site and also builds and tests its tools. More about their role is on the author page and the about page.

Before publication, the final review checks that a page:

• answers the reader’s main question
• relies on sources that suit the claim
• separates facts from estimates
• makes no unsupported claims
• explains the relevant limits
• follows our safety standards
• matches how our tools actually work and the reference ranges they use

We do not claim that Conan Jon holds medical, clinical, academic or vocal qualifications, and we do not describe this internal review as an independent professional or medical review.

Research and source standards

Different claims need different evidence. Depending on the topic, research may draw on:

• peer-reviewed studies and academic publications
• voice-science, medical and health organisations
• established vocal teaching and music-education resources
• interviews and official statements
• identifiable studio recordings and live performances
• technical documentation for browsers and audio technologies
• direct testing of our own tools with known test signals

Not every source carries the same weight. A casual blog post cannot support a health claim, and a singer’s range is not treated as confirmed just because the same figure appears on many websites. When credible sources disagree, we explain the disagreement or use cautious wording. We never invent studies, quotations, credentials, song examples or sources.

How we research singer vocal ranges

Published singer ranges often disagree, because they depend on which recordings are counted and what counts as a note. When assessing a singer’s range, we look at:

• whether the evidence is a studio or a live recording
• whether the notes are clearly identifiable, and the recording quality
• whether pitch correction, harmonies or backing vocals could mislead
• whether falsetto, whistle register, vocal fry, screams or non-sung sounds are included
• whether an extreme note was controlled and intentional
• how the singer’s voice has changed over time

If a figure cannot be confirmed, we call it reported, estimated, commonly cited or disputed, and we separate an extreme documented note from a singer’s practical working range. Each singer’s headline range is used consistently across the site, from the individual article to the famous singers vocal range chart and the singer comparison tool.

Voice types and classification

Range and voice type are related but not the same. Your lowest and highest notes alone do not decide whether you are a soprano, mezzo-soprano, contralto, tenor, baritone or bass; tessitura, timbre, register changes, vocal weight, comfort, training and repertoire matter too. Our tools therefore report the closest match by range, never a definitive voice type. The voice types guide explains the categories.

To keep answers consistent, the site uses one set of reference ranges everywhere: soprano C4–C6, mezzo-soprano A3–A5, contralto F3–F5, tenor C3–C5, baritone A2–A4 and bass E2–E4. The same figures appear in the tools and in the typical vocal ranges guide.

How we build, test and describe tools

A tool page must explain what the tool does, what input it needs, what it measures, what it calculates or estimates, how to read the result, what commonly causes errors, what happens with the microphone and what the tool cannot do.

Every tool version is tested before release in a WordPress test installation with Microsoft Edge. Pitch tools are checked with known test tones through a simulated microphone, and calculators against worked values. Each release has a written QA report that lists passes, failures and what was not tested. The current reports for the site’s 11 tools record 240 passed checks, 0 failed checks and 53 items not tested; the untested items include Safari on Mac and iPhone, Firefox, Chrome on a physical Android phone and, for some tools, real human voices.

We never describe a browser tool as clinically or professionally accurate. How the tools work is explained on how the vocal range calculator works, why results vary is covered in the vocal range test accuracy guide, and common fixes are in the troubleshooting guide.

Health and vocal-safety content

Some articles touch on vocal health: range extension, high and low notes, vocal folds, hoarseness and lifestyle factors. This content is educational and does not diagnose, treat, cure or prevent any condition. Health claims need authoritative sources, and we avoid unsupported treatment advice.

Our content never encourages anyone to force extreme notes or to sing through pain. Lasting pain, unexplained hoarseness, sudden voice loss or breathing difficulty should be checked by a qualified professional, such as an ENT doctor or a speech-language pathologist. Further limits are set out in our disclaimer.

AI-assisted work

AI tools may help with organising research, outlining, preparing a first draft, improving clarity or spotting claims that need more checking. AI output is never treated as evidence or as a source. Important factual claims are checked against suitable sources, and every page is reviewed before publication. AI assistance does not remove human responsibility: Conan Jon is responsible for everything published on the site, and we do not knowingly publish unreviewed AI text as authoritative information.

Independence and money

Editorial conclusions are based on evidence and usefulness, not commercial interest. VocalRangeCalculator.com is free to use and is supported by display ads served by Journey by Mediavine. The ads are kept separate from the editorial content: advertisers do not choose topics, review pages before publication or influence what we write, which singers we cover or how the tools calculate.

If sponsorship or affiliate relationships are ever introduced, they will be clearly disclosed where they appear. Sponsored material will never be presented as independent editorial opinion, and no commercial relationship will be allowed to change tool calculations, test results, safety guidance or factual conclusions.

Updates and corrections

We review and update pages when better evidence appears, an error is found, a tool or its method changes, browser behaviour changes, a term becomes misleading, a singer’s range can be better documented, or a reader reports a problem.

An updated date means a real review or revision; we do not change dates just to make old content look fresh. Confirmed errors are corrected as soon as reasonably practical, and a significant correction may carry a short note explaining what changed.

To report an error, email contact@vocaltoollab.com or use the contact page. Please include the page address and, if possible, a source.

What we do not publish

• invented credentials, quotations, studies or evidence
• guaranteed vocal results or improvements
• estimates presented as established facts
• advice that encourages unsafe singing
• unsupported medical claims
• a definitive voice type based on range alone
• unverified singer ranges presented as certain
• exaggerated claims about the accuracy of an online tool
• advertising disguised as independent editorial content
• pages that exist mainly to repeat keywords