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[from a Google LLM around 2026-08]
To focus exclusively on the specific pitch relationships needed to
replicate vowel formants, we look at the exact note intervals created by
F1 and F2 relative to a fundamental bass note (F0, set here as
C).
Because F2 is often several octaves above F1, the best way to approximate
these formants is through highly specific dyads (two-note combinations)
or open-voiced note clusters played high above the root note, rather
than standard, stacked rhythm section chords.
Here is the updated mapping focusing strictly on the note interactions:
Vowel-to-Note Harmonic Mapping
| Vowel (IPA) |
Sound Example |
Target F1 Note Interval (Over C Root) |
Target F2 Note Interval (Over C Root) |
Essential Formant Notes |
Acoustic Reason |
| /i/ |
"see", "meet" |
Low / Compressed: Close to the fundamental octave or fifth. |
Extremely High: Often 3 to 4 octaves up, targeting the Major 7th or Major 3rd. |
C (low) + B / E (high) |
The massive frequency gap requires a stark, wide interval spanning multiple octaves with a piercingly high top note. |
| /u/ |
"boot", "rule" |
Low: Compressed near the lower partials. |
Low: Sits tightly just above F1. |
G (mid) + C (mid) |
The dark, muffled quality of this vowel means both formants crowd into a tight, consonant interval (like a perfect fourth or fifth) in a lower octave. |
| /ɑ/ |
"father", "bravo" |
High: Pushed up toward the 5th or Minor 7th harmonic. |
Mid-High: Drops down closer to F1, near the 9th or Major 3rd. |
Bb (mid) + D (mid-high) |
The wide-open mouth cavity pushes F1 and F2 close together in a bright, buzzy mid-range cluster that mimics a dominant extension. |
| /æ/ |
"cat", "bat" |
High: Highly elevated, floating around the 5th or 6th harmonic. |
High: Extremely high and sharp, near the #11 or Major 7th. |
E (mid-high) + F# (high) |
This bright, nasal vowel creates a tense, rubbing interval (like a major second or tritone) suspended high above the bass note. |
| /ɔ/ |
"caught", "saw" |
Low-Mid: Sits lower down near the minor 3rd. |
Low-Mid: Compressed closely right above F1. |
Eb (mid) + G (mid) |
The rounded lips lower both resonances, creating a closely spaced, darker minor-third or perfect-fifth interval. |
🎹 Implementation Tip
To test this on a piano or synthesizer:
1. Hold down a low C with your left hand to act as the vocal cord fundamental (F0).
2. Play the Essential Formant Notes with your right hand at least two to three octaves higher.
3. Adjust the volume of your right hand; F1 is usually slightly louder than F2. The closer your right hand matches these precise pitch filters, the more your instrument will sound like it is "talking."
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