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Choir Range Fit & Best Key Checker

Upload a MusicXML, MXL, or MIDI score, map the vocal parts, compare transpositions, and collect private-by-link singer ranges to find the best key for the whole choir.

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How to Use the Choir Range Fit & Best Key Checker

  1. 1

    Load the score locally

    Choose a MusicXML, XML, MXL, MID, or MIDI file, or open the built-in demo. The score is parsed in your browser and is not uploaded.

  2. 2

    Map the choir parts

    Match each score line to soprano, alto, tenor, bass, or a custom ensemble part. Review the starting vocal ranges and adjust them if needed.

  3. 3

    Compare the ranked keys

    Run the fit analysis, inspect difficult measures, and compare the original key with the ranked transpositions. Choose a candidate to recalculate all part results.

  4. 4

    Export or invite singers

    Download a verified transposed score or privacy-safe result card. You can also create a 30-day singer room and share its clean public link or QR code.

  5. 5

    Refine the choice with real ranges

    Ask singers to submit their comfortable notes manually or with the optional live microphone helper. Use the aggregate dashboard to select the final key, then confirm it in rehearsal.

Sources & Verification

MusicXML 4.0 SpecificationStandard MIDI File Specification (MMA)W3C Music Notation Community Group

Published by ConvertCrunch Editorial Team | Our Methodology

Frequently Asked Questions

What does the Choir Range Fit & Best Key Checker do?
It reads the pitches and durations in a MusicXML, compressed MXL, or MIDI score, lets you map those lines to your choir parts, and ranks transpositions against preset or singer-submitted ranges. It highlights difficult measures and shows whether each key is comfortable, workable, demanding, or poor.
Does my choir score get uploaded?
No. Score parsing, pitch analysis, warnings, and transposition run in your browser. If you create a singer room, the server receives only a compact derived pitch profile, the public room title, the ensemble setup, and submitted range data. It never receives the score file, filename, lyrics, or microphone audio.
How do singer range rooms work?
Create a room after analysing a score, then share its public link or QR code. Each singer chooses a part and submits comfortable low and high notes. Public visitors see aggregate counts and recommendations. A singer sees their own fit. The owner can see and remove individual responses, change the selected key, close responses, extend expiry, or delete the room.
How private are singer names and vocal ranges?
A submitted name is optional. Exact names and ranges are visible only to the singer on the same device and to the room owner. They do not appear in public room results, social previews, QR codes, result cards, analytics, or page metadata. Rooms use unguessable links and expire after 30 days unless the owner extends them.
Can the tool find my range with a microphone?
Yes, as an optional helper. The browser listens for one steady low note and one steady high note, confirms each detected pitch, and places the note names into the form. Audio is analysed live and is never recorded, stored, or uploaded. Manual note entry remains available if permission is denied or detection is unreliable.
Can I download a transposed MusicXML, MXL, or MIDI score?
Yes. The tool reparses and verifies a transposition before enabling its download. For a room opened later, the owner must have opted to save the original score in that browser or re-upload the exact original file. The server cannot supply the score because it never stores the source bytes.
Is the recommended key guaranteed to be right for every singer?
No automated range score can replace a rehearsal. The ranking balances overall fit with the weakest represented part and labels whether it is based on presets, incomplete singer coverage, or every represented part. Use it to shortlist keys, then confirm breathing, vowel shape, dynamics, solo passages, and musical character with the choir.

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