# Singing, measured — PitchHighway research data

Source: https://pitchhighway.com/research
Site: PitchHighway — learn to sing your favorite songs (https://pitchhighway.com)

Data as of 2026-08-05. Updated quarterly.

## What this page is

Aggregate measurements from real PitchHighway usage: guided vocal range tests, the vocal lines of songs users uploaded to learn, and scored practice attempts. Every figure is an aggregate — none describes an individual person or performance — and internal, test and staff accounts are excluded throughout.

The numbers are free to cite with attribution (CC BY 4.0, see "Citation" below). Please carry the as-of date with any figure you quote: the snapshot is refreshed quarterly and the values move.

## Finding 1 — how wide is a real singer's range?

- Voices measured: 632
- Median range span: 23 semitones (just under two octaves)
- Middle half (25th–75th percentile): 17–30 semitones
- Median range: D3–C#5

Across 632 measured voices the median range is 23 semitones, running D3–C#5. Half of all singers land between 17 and 30 semitones, so a range under two octaves is the ordinary case, not a shortfall. Published ranges usually look larger because they belong to professional singers quoted at their extremes. A 23-semitone working range is enough for most popular music, provided the song sits in the right octave.

Measure your own range: https://pitchhighway.com/voice-range

## Finding 2 — how much range do songs demand?

- Songs measured: 336
- Median vocal-line span: 20 semitones
- Middle half (25th–75th percentile): 16–25 semitones
- Spanning more than two octaves: 87 of 336 songs (26%)

The vocal line of the median uploaded song spans 20 semitones. Against the median measured voice at 23 semitones, the margin is only 3 semitones: a typical song nearly fills a typical range, leaving almost nothing spare for singing it in the wrong octave. That is why "can I sing this?" is usually a range question before it is a technique question, and why the answer changes when the song is shifted by an octave. 26% of these songs span more than two octaves, which no octave shift can rescue for a median voice.

Per-song figures: https://pitchhighway.com/songs
How each figure is computed: https://pitchhighway.com/songs#methodology

## Finding 3 — practice on one song works, fast

- Repeat-practice pairs (same singer, same song run or drill): 604 (by 171 singers)
- Median relative gain, best vs first attempt: +39%
- Share of pairs that improved at all: 77%
- Median attempt on which the best score landed: 2

Pairing the first and best scored attempt each time a singer repeated the same piece — a full-song run or a single drill from a song's journey — gives 604 pairs from 171 singers. The median relative gain is 39%, 77% of pairs improved at all, and the median best score landed on attempt 2.

**Read this narrowly.** It measures improvement *on the song that was practiced* — a learning effect on one piece of music, not evidence that general singing skill transferred to anything else. It also says nothing about singers who tried a song once and never returned, since a single attempt cannot be paired. Across the same population there are 3961 scored attempts by 263 singers overall.

## Methodology

**Vocal ranges** come from the app's guided voice exploration: the singer slides up and down on an open vowel while on-device pitch detection records the lowest and highest note held steadily. One profile per person, the most recent measurement. Profiles missing an end, or with a zero or negative span, are dropped.

**Song spans** are measured from the vocal line the audio pipeline extracts from each uploaded song — the lowest and highest note of the melody itself, not of the full mix. Difficulty, tessitura and phrasing tempo are computed the same way (see https://pitchhighway.com/songs#methodology). Auto-seeded starter songs and deleted uploads are excluded.

**Improvement** is the median of the per-singer, per-piece relative gain between the first and best scored attempt on the same song run or journey drill, over pairs with at least two scored attempts. Scores from different drills are never compared to each other. Highway song runs and song-journey drills count; unscored practice does not.

**Exclusions.** Internal, test and staff accounts are filtered out of every figure by email domain, so the numbers describe real users only.

## Limitations

- **Self-selected population.** These are people who chose a singing app, not a random sample. Do not read the figures as describing the general public.
- **Self-administered range test.** A singer who pushes gets a wider result than one who stops at comfort, and no teacher verifies either.
- **No demographic normalization.** Nothing is adjusted for age, gender or training background, all of which move vocal range.
- **Improvement is confounded with familiarity.** Repeating a song improves the score partly by learning the song — which is what the app is for, but is not the same as becoming a better singer in general.

## Citation

Free to cite, quote and chart, including commercially, under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attribute to PitchHighway and link to https://pitchhighway.com/research. Carry the as-of date (2026-08-05) with the number.

Contact: support@pitchhighway.com
Press kit (logos, screenshots, boilerplate): https://pitchhighway.com/press

## Related

- Song database — per-song key, tempo, vocal range and difficulty: https://pitchhighway.com/songs
- Vocal range test — measure your own range in about 60 seconds: https://pitchhighway.com/voice-range
- Vocal range chart — reported ranges of famous singers: https://pitchhighway.com/vocal-range-chart
- Start free in the browser: https://pitchhighway.com/register