One of the reasons I teach more of the Estill method, rather than SLS (Speech Level Singing) is because it has recipes/structural options for bases of different, recognisable voice qualities. This makes it easy to switch between styles through vocal coordinations. In this article, I will break down each of these recipes from an anatomical standpoint, what it is useful for, what can make it restrictive and examples to listen to. I use varying levels of the terminology with my students, so don’t worry if we haven’t covered some of these in our lessons yet. Also, I am using a mix of Estill terminology and some more general terminology for simplification and accessibility purposes.
For those of you who I see in person, you will have seen this poster on my wall. Use this for reference for anatomical terminology and placement.
1. Speech Quality 2. Sob and Cry Quality 3. Opera Quality 4. Twang Quality - Nasal and Oral Twang 5. Belt Quality 6. Falsetto Quality
1. Speech Quality
Speech quality creates a direct, conversational sound. It is especially useful when lyrics need to feel immediate, text-led and rhythmically precise.
Listen for it: - “Electricity” - Billy Elliot - “Telly” - Matilda - Lily Allen
The Recipe: - Glottal onsets - Thick vocal folds - No thyroid tilt - Wide aryepiglottic sphincter (AES), or “twanger” - this means that it will generally have no/little twang, but this may vary - Mid/high laryngeal position
Where it is useful: - Patter songs - Songs requiring very precise or extreme diction - Direct, conversational storytelling - Short phrases
How it sounds and feels: - Casual and natural - Direct - Connected - Less breath-dependent - Close to normal speech
Risks and limitations: Constriction may appear when speech quality is taken outside the performer’s comfortable speaking range of pitch. The quality also has a natural ceiling on volume; trying to force more sound may lead to pushing at the vocal folds.
Thyroid tilt can take over as the pitch rises, which changes the quality. This means both range and volume may be limited.
Troubleshooting: You cannot reach the note - Introduce a little thyroid tilt, add anchoring or use more twang.
2. Sob and Cry Quality
Sob and cry share several ingredients, but their resonance and larynx positions create different emotional colours. Cry can feel sweet, gentle and natural, whereas sob often produces a richer, darker and more relaxed tone.
Listen for it: - “It Takes Two” - Into the Woods - “Daddy’s Son” - Ragtime - “Bring Him Home” - Les Misérables
The Cry Recipe: - Thin vocal folds - Smooth onsets - Thyroid tilt - High tongue - Anchoring and abdominal support - Mid-to-high larynx - Likely to include vibrato
The Sob Recipe: - Thin vocal folds - Smooth onsets - Thyroid tilt - Anchoring and abdominal support - Low larynx - Vibrato
Where it is useful: Cry: - Legit musical theatre - Contemporary musical theatre - Gospel
Sob: - Jazz - Marking songs in rehearsal
How it sounds and feels: Cry: - Easy and comfortable - Gentle or sweet - Natural - Supportive of controlled breath use
Sob: - Rich and relaxed - Easier for breath control than cry - Similar to the beginning of a yawn
Risks and limitations: There are no specific risks noted here when the qualities are produced comfortably. However, the recipe may initially feel effortful when it differs from a singer’s habitual coordination.
Sob can be limited in volume. The effort used to anchor and lower the larynx may also create vibrato that becomes difficult to switch off.
Troubleshooting: High notes may feel harder in sob - Adjust the recipe and allow the larynx to rise as the pitch rises
3. Opera Quality
Opera quality combines strong anchoring and efficient resonance to create a large, rounded sound. It is designed to carry, making it valuable when a performer needs to be heard over an orchestra.
Listen for it: - Pagliacci - “Some Enchanted Evening” - South Pacific
The Recipe: - Thick or thin vocal folds - Thyroid tilt - Low larynx - Head, neck and torso anchoring - Narrow AES, or “twanger” - High velum/soft palate - Smooth onsets and offsets - Vibrato created by the interaction between the AES and larynx - generally very heavy on this
Where it is useful: - Opera - Golden Age musical theatre - Operetta - Classical acting - Performing over a full orchestra without amplification
How it sounds and feels: - Open and rounded - Smooth - Strong - Highly expressive
Risks and limitations: This is a high-intensity quality, so poor coordination may increase the risk of vocal-fold trauma. The quality should be directed into anchoring, laryngeal positioning and resonance rather than pushed through the vocal folds. Opera quality may not suit every performer, genre or space. Its volume and vibrato can be excessive in some contexts.
Troubleshooting: Too much vibrato makes the sound appear out of tune - Increase and stabilise the anchoring. High notes are difficult - Let the larynx rise slightly, keep the AES narrow and release any unwanted sob quality. Notes crack - Anchor more and regulate the breath - check that excess breath pressure is not pushing through.
4. Twang Quality: Nasal and Oral
Twang produces an efficient, bright sound that can cut through other sound without demanding heavy effort at the vocal folds. Nasal and oral twang use a similar core recipe, with the velum providing the key distinction. If you know me, you know I LOVE twang!
Listen for it: - Janice - Friends - Margery Gray - Anything Goes - “Adelaide’s Lament” - Guys and Dolls - Ethel Merman for oral twang
The nasal-twang recipe: - Narrow AES, or “twanger” - Mid-positioned velum - High larynx - High tongue - Thin vocal folds - Relatively little overall effort, with some effort used to narrow the AES and maintain the high larynx
The oral-twang recipe: - High velum - Otherwise, the same as nasal twang
Where it is useful: - Character voices - Increasing perceived loudness - Producing a sound that cuts through accompaniment
How it sounds and feels: Nasal twang: - Ringing - Piercing and intense - Sometimes deliberately annoying - Buzzy
Oral twang: - Bright - Brassy
Risks and limitations: The principal risk is constriction. Nasal twang can also be difficult to produce at low pitches; at very high pitches, it may lose its distinctly nasal character.
Troubleshooting: Nasal twang sounds scratchy - Check that breath is not being pushed through. Nasal twang loses brightness at a lower pitch - Check that the tongue and larynx have not dropped.
Belt is the high-energy “sweet shout” of musical theatre: bright, brassy and exciting. A successful belt feels powerful without excessive effort at the true vocal folds.
Listen for it: - Opening of “Circle of Life” - The Lion King - “Anything Goes” - Anything Goes, performed by Patti LuPone - “Santa Fe” — Newsies
The Recipe: - No large breath required - High tongue and high larynx - Cricoid tilt, or “cricoid kick” - Strong anchoring - Narrow AES - No resistance at the true vocal folds - Subglottic pressure that builds and releases efficiently
Where it is useful: - “Money notes” - Adding excitement, urgency or drama - High-impact musical moments
How it sounds and feels: - Loud - Brassy and bright - Energised - Powerful, clean and easy when well coordinated - Not always vibrato-rich - Low effort at the true vocal folds - Strong awareness of anchoring
Risks and limitations: Belt carries some risk when produced incorrectly. Anchoring and cricoid activity are essential parts of the coordination. The quality is naturally louder and does not suit every song or performance space.
Troubleshooting: The sound cracks after a breath, the larynx drops or AES narrowing disappears - Take a shallow breath rather than a full one. A long note cannot be maintained - Check the level of anchoring and make sure breath is not being pushed through. Some vowels are difficult to belt - Manipulate your vowel shapes into a comfortable place.
6. Falsetto Quality
Falsetto is a light, characterful quality produced with stiff vocal folds, minimal effort and, particularly in the female recipe described here, plenty of breath.
Listen for it: - Mary Sunshine - Frankie Valli - Marilyn Monroe
The Recipe: - Plenty of breath - not pushing breath - Very little muscular effort - Stiff vocal folds - You can modify, depending on goal, with either a wide or narrow AES
Where it is useful: - Character voices - Creating a deliberately light or stylised vocal colour
How it sounds and feels: - Light and breathy - Little or no vibrato
Risks and limitations: Falsetto can produce cracking sounds and may not offer a large usable range. Transitions into and out of the quality may therefore need focused practice.
How to use them all effectively
No voice quality exists in isolation. A performer may borrow a little thyroid tilt to extend speech quality, allow the larynx to rise within sob, or add twang to improve clarity and carrying power. The goal is not to reproduce a recipe mechanically, but to understand which ingredients create the desired sound, and then adjust them without adding unnecessary effort.