How is this different from a tuner for choir?

A tuner reports cents off from the nearest semitone. A choir practice tool treats the section as the target — you see each singer’s contour relative to a shared reference pitch, which is what blend actually depends on.

Can it help my section sing cleaner unisons?

Yes. When every voice is on top of the same pitch line, the contour stays narrow and steady. When one voice drifts, the line thickens or splits — and the section can see the exact moment it happened.

Does it work with sacred, classical and pop choir music?

Yes. The tool only cares about pitch behaviour, not style. Sacred, classical, jazz, barbershop, show choir and contemporary pop all benefit equally from better unison and section work.

Can individual choir members practice at home?

Yes — and this is one of its best use cases. Each singer opens the page on their own device, works on their part with the live contour, and arrives at rehearsal already solid.

Is it useful for directors?

Yes. It gives one shared visual reference the whole section can see, which shortens the feedback loop compared to describing intonation in words during a rehearsal.

Do I need special equipment?

No. A laptop or phone microphone is enough for individual practice. For rehearsal-room use, a USB condenser near the section gives cleaner readings and is still inexpensive.

Choir practice tool

The section is blending — or it isn’t. Now you can see which.

Fiume’s choir practice tool shows each voice’s pitch contour relative to the section target. Unison cleans up, section drift becomes visible, and the director has one picture everyone can point at.

Open choir practice tool Read the FAQ

Free in your browser. Works for rehearsal rooms and home practice.

Animated preview of Fiume choir practice tool.

Unison as a shape

When every voice matches, the contour is one narrow line. When it splits, everyone sees who pulled it and when.

Section work by part

Soprano, alto, tenor and bass can each run their line with its own pitch target.

Individual home practice

Singers arrive at rehearsal already locked in because they practiced with real-time feedback at home.

Runs in the browser

No install, no sign-up, no upload. Share one link with the entire choir.

Why blend is the hard part

Choir intonation is a group problem, not a solo one

Every singer can be individually “in tune” and the section can still sound muddy. The three things below are what Fiume makes visible.

Shared center

Two singers at +5 cents and -5 cents are both “close” on a solo tuner but produce a beating unison. On the contour they show up as a split line you can actually align.

Sustain drift

A section starts in tune and slides flat across four bars. The contour shows the collective drop, not just a single voice falling behind.

Entrance matching

The first 200 ms of each entrance decides whether the chord locks. The contour makes the approach visible so you can shape it.

Who uses it

Choirs and singers Fiume was built to support

From volunteer community choirs to professional chamber groups, the underlying problems are the same. The tool scales with you.

Community choirs Warm up with unison drills and watch the section line settle into a single thin contour as the blend locks in.
Chamber & vocal ensembles Work on tuned chords by rotating through each member and using the contour to align centers to the cent.
School & university choirs Give each student a home-practice link. They arrive already prepared and the rehearsal goes twice as far.
Church choirs Check unison hymn lines and tune sustained final chords without relying on the organist’s reference alone.
Section leaders Lead a sectional with one visual reference that the whole group can see and agree on.
Directors and conductors Spot drift patterns across a rehearsal and make specific adjustments instead of generic “listen to each other” notes.

How to use it

A three-step choir-practice loop

Keep the problem small. One phrase, one section, one adjustment. The pattern works for a two-person duet and for a hundred-voice community choir.

1
Pick one phrase

Often a unison line, a sustained chord or a tight interval. Identify which one is not blending yet.
2
Run it once and watch

Take a baseline. Note whether the issue is center drift, entrance attack, or one voice pulling the rest.
3
Adjust and compare

Change vowel shape, breath alignment or internal balance. Run it again and check that the contour actually got thinner and steadier.

FAQ

Choir practice questions, answered

Can the whole section sing into one mic?

Yes. A single mic picks up the blended result, which is exactly what you want to read. Individual mics are better for identifying specifically who drifted.

Is it compatible with just-intonation tuning?

Yes. The contour shows actual pitch behaviour, so you can tune chords in pure ratios rather than equal temperament when the repertoire calls for it.

Will it work for kids’ choirs?

Yes. Higher voices are handled the same way. No audio leaves the device, so it is suitable for school environments.

Can I use it over video calls for rehearsal?

Each singer runs the tool locally and shares a screenshot or screen. Real-time ensemble over video suffers from latency; individual practice is more practical.

Does it help with vibrato in choir?

Yes. You can see vibrato width and rate and decide together whether to blend vibratos or use a straighter tone on specific phrases.

Is it free for a choir of any size?

Yes. Share one link with the whole ensemble. Each device opens its own session in the browser.

Make the section’s blend visible

Run a unison line, watch the contour, adjust together. The section tightens up within minutes.

Open choir practice tool

Free, private, no account needed.