---
title: Song Transposition and Voice Classification System
---
| Voice Types | Vocal Synth Character References |
|---------------------------------------|----------------------------------------------|
| High Treble / E-Flat High (Eb'; rare) | Akane and Aoi Kotonoha |
| Treble / C High (C') | Akari Kizuna, Seika Kyōmachi, Xīngchén, Gumi |
| Meane / B-Flat High (Bb) | Eleanor Forte, Luka Megurine, Anri, Solaria |
| Alto-Tenor / G Middle (G) | Mùxīn, Yohio, Saros, Yuzuru Iori |
| Tenor / E-Flat Middle (Eb) | Kaito, Kevin, Genbu, VY2 |
| Baritone / C Low (C) | Frimomen |
| Bass / B-Flat Low (Bb°) | Asterian, Ryūsei Aoyama |
| Sub-Bass / F Low (F°; rare) | |
| Voice Types | Remarks to Do a Do-Re-Mi TikTok Filter Challenge |
|----------------------------------------|-------------------------------------------------------------------|
| High Treble / E-Flat High (Eb'; rare) | Key is low but effortless to do, as long as the singer is in tune |
| Treble / C High (C') | Perfectly suited |
| Meane / B-Flat High (Bb) | Doable, but requires effort |
| Alto-Tenor / G Middle (G) | Proceed with caution as it leads to voice cracks |
| Tenor / E-Flat Middle (Eb) | Either sing in falsetto or belt very powerfully |
| Baritone / C Low (C) | To be sung in falsetto |
| Bass / B-Flat Low (Bb°) | To be sung in falsetto with slightly more effort |
| Sub-Bass / F Low (F°; rare) | To be sung in falsetto but needs more effort |
**Range guide in a voice type of Treble / C High (C'):** ··· ‐ G3 - [C4 ‐ C5] ‐ F5 ‐ ···
**Falsetto transition point for Treble / C High (C'):** at least around A4 or Bb4
**Note:** Middle C is notated as C4. Use the widely accepted tuning system which is 12-tone equal temperament, associated with its standardized reference note for A4 which is 440Hz.
**Criteria for identifying the person's voice type:**
* average spoken pitch
* gender factor of the voice (formant)
**Short singing voice test for voice classification:**
* Let a singer sing a major scale solmization (Do-Re-Mi-Fa-Sol-La-Si-Do) in a key referring the table above.
**Note:** The person who identifies the another person's voice type must have an absolute/perfect pitch. The person who has an absolute/perfect pitch to sing, especially in a choir, is very advantageous. For choral performances, expect that all choristers should have their own absolute/perfect pitch to stay in tune when singing homophonically, or especially, polyphonically, by striving to be accustomed to the widely accepted tuning system and reference pitch, which is 12-tone equal temperament (12-TET) at 440Hz. Of course, choristers must know how to read and write sheet music.
| Choral Parts | Voice Types to Sing |
|------------------------------------------------------|------------------------------------------------------------------------------------|
| Treble / Normal C High (C') | |
| Meane / Normal B-Flat High (Bb) | |
| Alto-Tenor / Normal G Middle (G) | |
| Tenor / Normal E-Flat Middle (Eb) | |
| Baritone / Normal C Low (C) | |
| Bass / Normal B-Flat Low (Bb°) | |
| Soprano / Choral Falsetto F High (F') | Treble / C High (C'), Meane / B-Flat High (Bb), or Alto-Tenor / G Middle (G) |
| Mezzo-Soprano / Choral Falsetto E-Flat High (Eb') | Meane / B-Flat High (Bb), Alto-Tenor / G Middle (G), or Tenor / E-flat Middle (Eb) |
| Countertenor / Choral Falsetto C High (C') | Alto-Tenor / G Middle (G), Tenor / E-flat Middle (Eb), or Baritone / C Low (C) |
| Low Countertenor / Choral Falsetto B-Flat High (Bb) | Tenor / E-flat Middle (Eb), Baritone / C Low (C), or Bass / B-Flat Low (Bb°) |
| Strohbass I / Fry C Very Low (C°) | Tenor / E-flat Middle (Eb), or Baritone / C Low (C) |
| Strohbass II / Fry Bb Very Low (Bb°°) | Baritone / C Low (C), or Bass / B-Flat Low (Bb°) |
| Choral Roles | Choral Parts Used from My Setup | Vocal Synth Voices Used from My Setup |
|-----------------------------------|---------------------------------------|---------------------------------------|
| Lead | Treble / Normal C High (C') | Akari Kizuna |
| Accompaniment I | Soprano / Choral Falsetto F High (F') | Eleanor Forte, or Prima |
| Accompaniment II | Treble / Normal C High (C') | Xīngchén, or VY1 |
| Accomp. III and beyond (optional) | | |
| Bass Role | Strohbass II / Fry Bb Very Low (Bb°°) | Asterian |
---
**Song transposition method:** using C4 - C5 range basis (other name: Treble's centralized range basis)
**Transposition examples:**
* Example 1:
* Song's original key and its range: Ab; Eb4 - Eb5 (octave (even-numbered range interval, 12 semitones))
* Note distribution assumption: normally distributed
* After transposition: F; C4 - C5
* Target vocal type to sing: Meane / B-Flat High (Bb), or Bass / B-Flat Low (Bb°)
* Final transposed key: Eb; Bb3 - Bb4
* Example 2:
* Song's original key and its range: G; D4 - E5 (major ninth (even-numbered range interval, 14 semitones))
* Note distribution assumption: negatively skewed
* After transposition: Eb; Bb3 - C5 (Note: if normally distributed, E; B3 - C#5; but if positively skewed, F; C4 - D5)
* Target vocal type to sing: Alto-Tenor / G Middle (G)
* Final transposed key: Bb; F3 - G4
* Example 3:
* Song's original keys and its range: Bb and B; F3 - Bb4 (eleventh (odd-numbered range interval, 17 semitones))
* Note distribution assumption: slightly negatively skewed
* After transposition: D and Eb; A3 - D5 (Note: if positively skewed slightly, Eb and E; Bb3 - Eb5)
* Target vocal type to sing: Treble / C High (C'), or Baritone / C Low (C)
* Final transposed keys: D and Eb; A3 - D5
* Example 4:
* Song's original key and its range: C; G3 - E5 (major thirteenth (odd-numbered range interval, 21 semitones)) or even wider
* Note distribution assumption: extremely negatively or positively skewed, or even normally distributed
* After transposition: Something is wrong with the melody; needs a decision to be revised.
* Target vocal type to sing: Tenor / E-flat Middle (Eb)
* Final transposed key: will be transposed after revising the melody
**Rating system for difficulty based on every song's range interval:**
* A (Beginner): less than a minor third - diminished fifth
* B (Novice): fifth - minor seventh
* C (Intermediate): major seventh - major ninth
* D (Advanced): minor tenth - diminished twelfth
* E (Expert): twelfth or more
Interval between two rating levels: major third
**Transposition modes:**
* According to the entire song's melody range and note distribution (only for fixed melodies)
* According to the original singer's voice type
If we do not wish to transpose a song, just select a voice type that centrally fits the entire song's notes to the vocal range guide.
---
**Composing a song based on centralized C4~C5 rule for Treble / C High (C') singers**
**C major or A minor:** (B3)-**C4**-D4-E4-F4-G4-*A4*-B4-**C5**-(D5)
**Db major or Bb minor:** (*Bb3*)-C4-**Db4**-Eb4-F4-Gb4-Ab4-*Bb4*-C5-(**Db5**)
**D major or B minor:** (*B3*)-C#4-**D4**-E4-F#4-G4-A4-*B4*-(C#5-**D5**)
**Eb major or C minor:** (Bb3)-*C4*-D4-**Eb4**-F4-G4-Ab4-Bb4-*C5*-(D5)
**E major or C# minor:** (B3)-*C#4*-D#4-**E4**-F#4-G#4-A4-B4-(*C#5*)
**F major or D minor:** (Bb3)-C4-*D4*-E4-**F4**-G4-A4-Bb4-C5-(*D5*)
**Gb major or Eb minor:** (Bb3-Cb4)-Db4-*Eb4*-F4-**Gb4**-Ab4-Bb4-Cb5-(Db5)
**G major or E minor:** (B3)-C4-D4-*E4*-F#4-**G4**-A4-B4-C5-(D5)
**Ab major or F minor:** (Bb3)-C4-Db4-Eb4-*F4*-G4-**Ab4**-Bb4-C5-(Db5)
**A major or F# minor:** (B3)-C#4-D4-E4-*F#4*-G#4-**A4**-B4-(C#5-D5)
**Bb major or G minor:** (**Bb3**)-C4-D4-Eb4-F4-*G4*-A4-**Bb4**-C5-(D5)
**B major or G# minor:** (**B3**)-C#4-D#4-E4-F#4-*G#4*-A#4-**B4**-(C#5)
---
**Primary modal frames for melody composition (in a key of C for this example)**
References:
https://en.wikipedia.org/wiki/Modal_frame
https://en.wikipedia.org/wiki/Parlour_music
* Tonic-octave mode; my alias: "Major Scale Solfege"
* Set of notes: [C], D, E, F, G, A, B, [C']
* Notes used for major scale solfege singing practice: (B°), C, D, E, F, G, A, B, C', (D')
* Dominant-octave mode; my alias: "Natural Trumpet Notes"
* Set of notes: G°, A°, B°, [C], D, E, F, G
* Typical melodic notes from natural trumpet: G°, (A°, Bb°, B°,) C, D, E, F, (F#), G, (A)
* Mediant-octave mode; my alias: "Treble Clef Staff Notes"
* Set of notes: E, F, G, A, B, [C'], D', E'
* Notes used to create a melody with treble clef, without a key signature and ledger lines: (D), E, F, G, A, B, C', D', E', F'
**Variants derived from primary modal frames (in a key of C for this example)**
* Example 1:
* Set of notes: [C], D, E, F, G, A
* Modal frame variant: Tonic-octave, highs removed
* Example 2:
* Set of notes: A°, B°, [C], D, E, F, G, A
* Modal frame variant: Dominant-octave, lows removed, highs added
* Example 3:
* Set of notes: D, E, F, G, A, B, [C'], D'
* Modal frame variant: Tonic-octave, lows removed, highs added
* Example 4:
* Set of notes: G°, A°, B°, [C], D, E, F, G, A
* Modal frame variant: Dominant-octave, highs added
* Example 5:
* Set of notes: G°, A°, B°, [C], D, E, F
* Modal frame variant: Dominant-octave, highs removed
* Example 6:
* Set of notes: B°, [C], D, E, F, G, A, B
* Modal frame variant: Tonic-octave, lows added, highs removed
* Example 7:
* Set of notes: B°, [C], D, E, F, G, A
* Modal frame variant: Tonic-octave, lows added, highs removed
* Example 8:
* Set of notes: E, F, G, A, B, [C'], D', E', F'
* Modal frame variant: Mediant-octave, highs added
* Example 9:
* Set of notes: E, F, G, A, B, [C'], D', E', F', G'
* Modal frame variant: Mediant-octave and dominant-octave combo
* Example 10:
* Set of notes: D, E, F, G, A, B, [C'], D', E', F', G', A'
* Modal frame variant: Mediant-octave and dominant-octave combo, lows and highs added
* Example 11:
* Set of notes: [C], D, E, F, G, A, B, [C'], D', E', F', G'
* Modal frame variant: Tonic-octave and dominant-octave combo
* Example 12:
* Set of notes: [C], D, E, F, G, A, B, [C'], D', E'
* Modal frame variant: Tonic-octave and mediant-octave combo
* Example 13:
* Set of notes: [C], D, E, F, G, A, B, [C'], D', E', F'
* Modal frame variant: Tonic-octave and mediant-octave combo, highs added
* Example 14:
* Set of notes: G°, A°, B°, [C], D, E, F, G, A, B, C'
* Modal frame variant: Dominant-octave and tonic-octave combo
#### List of diatonic modes on C
Note: Letters in [brackets] are relative major keys.
| No. |
Mode |
Scales |
| 1 |
C Major (I) |
[C] |
D |
E |
F |
G |
A |
B |
[C'] |
|
| 2 |
C Dorian (II) |
C |
D |
Eb |
F |
G |
A |
[Bb] |
C' |
|
| 3 |
C Phrygian (III) |
C |
Db |
Eb |
F |
G |
[Ab] |
Bb |
C' |
|
| 4 |
C Lydian (IV) |
C |
D |
E |
F# |
[G] |
A |
B |
C' |
|
| 5 |
C Mixolydian (V) |
C |
D |
E |
[F] |
G |
A |
Bb |
C' |
|
| 6 |
C Minor (VI) |
C |
D |
[Eb] |
F |
G |
Ab |
Bb |
C' |
|
| 7 |
C Locrian (VII) |
C |
[Db] |
Eb |
F |
Gb |
Ab |
Bb |
C' |
|
| 8 |
B Mixolydian (V) |
B° |
C# |
D# |
[E] |
F# |
G# |
A |
B |
(C#') |
| 9 |
B Dorian (II) |
B° |
C# |
D |
E |
F# |
G# |
[A] |
B |
(C#') |
| 10 |
B Minor (VI) |
B° |
C# |
[D] |
E |
F# |
G |
A |
B |
(C#') |
#### Chromatic inversion in F#/Gb origin (C4~C5 flip)
| No. |
Mode |
Scales |
| 1 |
C Phrygian (III) |
C' |
Bb |
[Ab] |
G |
F |
Eb |
Db |
C |
|
| 2 |
C Dorian (II) |
C' |
[Bb] |
A |
G |
F |
Eb |
D |
C |
|
| 3 |
C Major (I) |
[C'] |
B |
A |
G |
F |
E |
D |
[C] |
|
| 4 |
C Locrian (VII) |
C' |
Bb |
Ab |
Gb |
F |
Eb |
[Db] |
C |
|
| 5 |
C Minor (VI) |
C' |
Bb |
Ab |
G |
F |
[Eb] |
D |
C |
|
| 6 |
C Mixolydian (V) |
C' |
Bb |
A |
G |
[F] |
E |
D |
C |
|
| 7 |
C Lydian (IV) |
C' |
B |
A |
[G] |
F# |
E |
D |
C |
|
| 8 |
C# Minor (VI) |
C#' |
B |
A |
G# |
F# |
[E] |
D# |
C# |
(B°) |
| 9 |
C# Dorian (II) |
C#' |
[B] |
A# |
G# |
F# |
E |
D# |
C# |
([B°]) |
| 10 |
Db Mixolydian (V) |
Db' |
Cb |
Bb |
Ab |
[Gb] |
F |
Eb |
Db |
(Cb°) |