# Tessitura vs. Vocal Range: What 710 Song Uploads Reveal

**Most of the melody fits in one octave—even when the song doesn’t.**

PitchHighway Research · September 5, 2026

**A song’s vocal range runs from its lowest note to its highest. Its tessitura describes the pitch region where most of the melody sits.** For a singer, tessitura can also refer to the region where singing feels most comfortable. These related uses are described in Ireland’s [Music Teacher Guidelines, page 72](https://www.curriculumonline.ie/getmedia/816b78a4-980b-4043-86e1-552b135b68dc/PSEC04c_Music_Guidelines.pdf#page=77). Here we study songs’ pitch distributions, not singers’ comfort.

A song’s range boundaries say nothing about how long the melody spends near either one. A brief low note counts just as much toward the span as a note repeated throughout the chorus.

We examined the generated pitch targets for 710 song uploads from 592 accounts. In **459 uploads—64.6%—a single octave contained at least 90% of the modeled sung duration.** Yet only 70 uploads, or 9.9%, kept their entire pitch range inside an octave.

Both numbers describe the same recordings’ transcriptions. The difference is whether we measure every extreme or where the melody spends its time.

## What does tessitura mean in a song?

Imagine two melodies that both extend from C4 to C5. One spends most of its time near C4; the other repeatedly returns to C5. Their full ranges are identical, but they sit in different places. This is an illustrative example, not a pair selected from our dataset.

Tessitura helps describe that difference. It is not one universally fixed percentile interval. For this study, we use the central 50% and central 90% of duration as explicit, reproducible summaries of where a transcription sits. They describe the melody; neither is a measurement of a particular singer’s comfortable range.

## Tessitura vs. vocal range: three views of the same melody

For each upload, we measured the full pitch span and two narrower intervals. The central 90% interval runs from the duration-weighted fifth-percentile pitch to the 95th-percentile pitch. The central 50% uses the 25th and 75th percentiles. Longer pitch events contribute more weight than shorter ones.

| Measurement | Median span across 710 uploads |
| --- | ---: |
| Full range: lowest to highest pitch target | 19 semitones |
| Central 90% of modeled sung duration | 12 semitones |
| Central 50% of modeled sung duration | 5 semitones |

An octave is 12 semitones. The median full span was therefore an octave plus seven semitones, while the median central 90% span was one octave.

These are three separate medians, not the anatomy of one representative song. When we calculated the reduction separately for every upload and then took its median, trimming the outer duration tails reduced the span by **six semitones**.

The lowest and highest target pitches together accounted for a median of just **2.7% of modeled sung duration**. That counts all events at either endpoint, including repeated visits. It does not count every note near those endpoints.

This gives range two useful meanings: the territory a melody visits, and the territory it usually occupies.

## Why “90% in one octave” has two answers

An interval with equal tails and the best-fitting octave answer slightly different questions.

For the central 90% interval, we remove up to 5% of duration from each end of the pitch distribution. By this definition, **367 of 710 uploads—51.7%—had a span of an octave or less**.

For the headline result, we slide a 12-semitone window across each upload’s pitches and find the position that contains the most duration. This window can leave more material below it than above it, or vice versa. **459 uploads—64.6%—reached at least 90% coverage this way.** Across all uploads, median coverage in the best-positioned octave was 93.9%.

This is a calculation on the transcription. It does not change a recording’s key or octave, and the best-positioned window is different for each upload. It also does not mean that a singer with a one-octave range can perform the whole song: the window may sit in the wrong register for that singer, and the remaining notes still exist.

## Even very wide transcriptions had a narrower center

There were 150 uploads with full spans greater than two octaves. Their median full range was 27 semitones; their median central 90% range was 16.

In **145 of those 150 uploads**, the central 90% interval was no wider than two octaves. In 49, a best-positioned single octave captured at least 90% of modeled sung duration.

That does not make a demanding passage trivial. A brief peak can be the moment a singer most wants to master. It does show why two endpoint notes cannot describe how continuously a song asks for its full range.

## How to use song range and tessitura when choosing a song

Our interpretation is that a useful song analysis should show both the full range and how pitch is distributed over time.

If most of a melody sits in a comfortable register and a few passages leave it, those passages provide a concrete place to focus practice. If the melody spends much of its time near the edge of a singer’s comfortable register, the challenge is more persistent. This study measures pitch distribution, however; it does not establish which practice strategy works better.

It also does not measure breath demands, vowels, loudness, register transitions or vocal fatigue. A narrow interval can still be difficult to sing. The practical takeaway is to inspect where a song sits and where its exceptions occur, alongside its highest and lowest notes.

You can start by [measuring your vocal range](https://pitchhighway.com/voice-range), then compare it with the range and tessitura figures in our [song database](https://pitchhighway.com/songs). Keep pitch location in mind: a 12-semitone span from C3 to C4 asks for a different register from C4 to C5. A range test records boundaries, so it does not by itself establish which notes you can sing comfortably throughout a song.

## Can you sing a song with a one-octave vocal range?

Some songs may fit, provided their lowest and highest notes both fall within your usable register. In our dataset, only 70 of 710 transcriptions had a full span of one octave or less. The larger 64.6% result concerns **90% of modeled duration**, not every note. It is not a list of songs that a singer with a one-octave range can perform in full.

## How we checked the result

The three median spans—19, 12 and 5 semitones—were unchanged in every sensitivity check below.

| Alternative sample or measurement | Uploads | At least 90% of duration inside some octave |
| --- | ---: | ---: |
| Main analysis | 710 | 64.6% |
| One upload per normalized upload title | 683 | 64.4% |
| First eligible upload per account | 592 | 65.0% |
| Exclude full spans greater than three octaves | 704 | 64.9% |
| Use word-level targets without syllable refinement | 710 | 65.8% |

We also checked for exact duplicates of the extracted pitch-duration-onset sequences; none were identical. This does **not** establish that these are 710 distinct compositions or recordings. Different uploads of the same song can have different titles, edits or generated transcriptions. Title grouping is only a rough sensitivity check, and retains the latest eligible upload for each normalized title.

## Methodology and limits

The production snapshot was captured on September 5, 2026, at 04:33:16 UTC. It contained 735 completed, non-seeded, non-deleted uploads with active standalone song exercises and an identifiable account owner, after excluding internal and staff accounts. We excluded 25 uploads with fewer than 20 usable pitch events or less than 10 seconds of summed pitch-event duration, leaving 710 uploads from 592 accounts. Journey deletion was not an exclusion: an uploaded song can remain available independently of its generated journey.

We analyzed stored song definitions in their original register. Voice cues contributed their syllable-level pitch events when a valid multi-syllable refinement was available; otherwise they contributed a word-level event. Missing syllable pitches fell back to the word pitch. Events required finite pitches within MIDI 0–127 and positive durations. Unpitched cues contributed no duration. Percentiles use the first pitch where cumulative duration reaches the stated threshold; tied pitches can make an interval contain more than its nominal percentage.

“Modeled sung duration” means the sum of those event durations. It excludes instrumental gaps and is not a fresh measurement of voiced audio frames; overlapping events, if present, contribute separately. Full ranges were recomputed from these same valid events, rather than copied from stored summary fields. Each upload receives equal weight in the reported medians. These definitions and eligibility rules differ from the older research overview, so differences between their figures should not be read as a time trend.

The data comes from an automated vocal extraction and pitch-target pipeline. Separation errors, octave mistakes, harmonies and alignment errors can affect both extremes and duration estimates. We did not re-listen to the original audio in Cloudflare R2 or independently validate these transcriptions against human annotations. Short-lived extreme targets may be real notes or errors; this analysis cannot distinguish them. Trimming duration tails measures sensitivity to extremes, not whether those extremes are correct.

This is a descriptive snapshot of uploads selected by people using PitchHighway, not a random sample of popular music or singers. Repeated songs and shared pipeline errors remain possible. The checks above show stability under several alternative calculations; they do not remove those limitations. No individual performance, lyric, account identifier or recording is published.

**Suggested citation:** PitchHighway Research, “[Tessitura vs. Vocal Range: What 710 Song Uploads Reveal](https://pitchhighway.com/research/song-range-vs-tessitura),” September 5, 2026. Production snapshot: 710 eligible upload transcriptions from 592 accounts.

**Related:** [Singing, measured](https://pitchhighway.com/research/singing-measured) · [Song measurement methodology](https://pitchhighway.com/songs#methodology)

Want to explore the melody of a song you love? [Upload it to PitchHighway](https://pitchhighway.com/register) to build a practice journey around it.