Examples
Examples
Try the starting example
- Source tonic
- C
- Target tonic
- D
- Note or chord-root list
- C,E,G,B
- Output spelling: sharps or flats
- sharps
- Transposed note or chord roots
- D, F#, A, C#
- Upward semitone interval
- 2
- Output pitch-class numbers
- 2, 6, 9, 1
Try another scenario
- Source tonic
- B
- Target tonic
- C
- Note or chord-root list
- C,E,G,B
- Output spelling: sharps or flats
- flats
- Transposed note or chord roots
- Db, F, Ab, C
- Upward semitone interval
- 1
- Output pitch-class numbers
- 1, 5, 8, 0
Calculation method
Calculation method
Transposed note or chord roots
Add the source-to-target pitch-class interval to each entered note, modulo 12.
Upward semitone interval
(Target pitch class − source pitch class) modulo 12, in the range 0 to 11.
Output pitch-class numbers
C=0 through B=11 for the transposed chromatic pitch classes.
Symbols and units
- a
- Source tonic
- b
- Target tonic
- c
- Note or chord-root list
- d
- Output spelling: sharps or flats
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Chromatic pitch-class transposition of note names or chord roots only. Chord quality, bass slashes, octaves and functional key spelling are excluded; use one letter with an optional # or b.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
MIDI Association: tuning specification ↗
Background reading; this does not imply endorsement or independent review of SumFizz.