Life & Health · 🇰🇷 Korea
Korean Karaoke Key Transposer
Korean karaoke key transposer with TJ·KY machine mapping and 100 K-pop presets.
About this tool
Noraebang Key Adjustment Calculator (Korea) takes the user’s comfortable vocal range (lowest / highest note) and the song’s original key, and instantly returns how many key-button presses (±N semitones) are needed on TJ Media or Kumyoung karaoke machines. Based on the standard 1 key = 1 semitone, it computes user-average minus song-average and recommends the right number, with auto-detection from a 1,000-song K-pop verse/chorus dataset. The vocal-range self-test page uses Web Audio API autocorrelation pitch detection — works with or without mic permission. Mic data and range results never leave the browser.
Use cases
Scenario 1
Male singing a female song
For a male tackling a female-vocal song, the tool computes the typical 5–7 semitone gap and suggests −5 to −7.
Scenario 2
K-pop high-range tune
Songs by IU/Taeyeon (G5–B5) typically need −3 to −5 keys for an average male voice; the tool fine-tunes to your real range.
Scenario 3
Vocal range self-test
Test your low / high notes against piano tones or — with mic permission — auto-detect via pitch tracking to nail your average range.
Scenario 4
TJ vs Kumyoung key differences
Same song, different machines — TJ ±10 vs Kumyoung ±6 limits and original-MR-key drift mean the tool shows recommended keys for both.
Scenario 5
Audio-quality limit guidance
≤±5 keys is transparent; ≥±6 introduces metallic tremolo, so the tool suggests octave shifts or alternative songs.
Features
- Instant ±N semitone recommendation from vocal-range delta
- Per-machine limits surfaced — TJ ±10 / Kumyoung ±6
- Auto-recommend from a 1,000-song K-pop range dataset
- Vocal-range self-test (piano compare + Web Audio API pitch detection)
- 100% in-browser mic processing — never uploaded
- Unlimited result-card PNG download
- Bilingual KO/EN UI
Frequently asked
- Q. How big is one karaoke key?
- A. One key = one semitone (C ↔ C#). 12 keys = 1 octave. Same on both TJ and Kumyoung.
- Q. Male vs female key gap?
- A. Roughly 5–7 keys (P4–P5) on average. Fine-tune to your actual range for precision.
- Q. Does heavy key shifting hurt audio quality?
- A. ≤±5 keys is mostly transparent; ≥±6 introduces tremolo and metallic ring. Use octave shifts for larger jumps.
- Q. Is my mic input uploaded?
- A. No — Web Audio API pitch detection runs locally; neither audio nor results are uploaded.
- Q. Is it free?
- A. 100% free with no signup or email collection. Unlimited tests and calculations.
Sources / references
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How we run it / disclaimer
This tool is advisory and does not constitute legal, tax, medical, or financial advice. All calculations and document generation run in your browser; inputs are never sent to a server. Ads follow Google AdSense policy and are kept separate from tool accuracy.