Song vocal range · J-Pop
"大不正解" by back number — Vocal Range & Karaoke Key
The vocal range of "大不正解" by back number is C3 to G#4 (20 semitones, about 1.7 octaves). The highest chest-voice note is G#4. Original key: F#m.
Notes are in scientific pitch notation (C4 = middle C). Japanese karaoke notation is shown in parentheses.
| Highest note | G#4 (mid2G#) |
|---|---|
| Lowest note | C3 (mid1C) |
| Chest-voice ceiling | G#4 (mid2G#) |
| Range | 20 semitones ≈ 1.7 octaves |
| Original key | F#m |
| BPM | 140 |
| Genre | J-Pop |
Can you sing it in the original key?
KKTI measures real voices (free, 30 seconds). The verdicts below use the measured averages: a comfortable chest-voice ceiling of about C5 for men (n=45) and D#5 for women (n=100), compared with this song's chest-voice ceiling of G#4.
Averages hide a 3–4 semitone spread between singers. The table below gives the key for your ceiling.
Recommended key by your highest chest-voice note
| Your highest chest-voice note | Recommended key for this song |
|---|---|
| E4 | Transpose down 4 semitones (key −4) |
| F4 | Transpose down 3 semitones (key −3) |
| F#4 | Transpose down 2 semitones (key −2) |
| G4 | Transpose down 1 semitone (key −1) |
| G#4 | Original key, just barely (headroom +0) |
| A4 | Original key, just barely (headroom +1) |
| A#4 | Original key works (headroom +2) |
| B4 | Original key works (headroom +3) |
| C5 | Original key works (headroom +4) |
| C#5 | Original key works (headroom +5) |
| D5 | Original key works (headroom +6) |
| D#5 | Original key works (headroom +7) |
| E5 | Original key works (headroom +8) |
| F5 | Original key works (headroom +9) |
| F#5 | Original key works (headroom +10) |
| G5 | Original key works (headroom +11) |
| G#5 | Original key works (headroom +12) |
| A5 | Original key works (headroom +13) |
"Key −3" means transposing the song down three semitones on the karaoke machine. Lowering the key also lowers the lowest note (C3 in the original key), so very wide songs can sink in the verses.
Reading the numbers
The range is the distance from the lowest to the highest sung note in the original recording. The chest-voice ceiling is the highest note sung without falsetto; it is what decides whether the chorus is comfortable. Japanese karaoke apps write notes as lowA–lowG#, mid1A–mid1G#, mid2A–mid2G#, hiA–hiG#, hihiA–hihiG#: mid2G = G4, hiA = A4, hiC = C5, hihiA = A5.
FAQ
What is the vocal range of "大不正解" by back number?
C3 to G#4 — 20 semitones (about 1.7 octaves). The highest chest-voice note is G#4.
Can a male singer sing "大不正解" in the original key?
Based on KKTI's measured average for male singers (comfortable chest ceiling around C5, n=45): Original key works (headroom +4). Individual ranges vary by 3–4 semitones, so measure your own ceiling first.
What key should a female singer use for "大不正解"?
Based on KKTI's measured average for female singers (comfortable chest ceiling around D#5, n=100): Original key works (headroom +7).
More songs
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- Where Our Blue Is (青のすみか) – Tatsuya Kitani (G#2 to C#5)
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