- Rather than suppressing upper notes, bassoon register unevenness is best addressed by accepting the natural response differences and aligning your weight placement and airflow
- In 4/4 time, place weight on beats 1 and 3 (especially the lower notes) and "back-calculate" the upper notes to create overall balance
- Shape staccato with air support rather than tongue force, so even upper notes sound natural
- By being aware of harmonic direction and progression, even repeated rhythmic patterns gain tonal consistency, making register unevenness less noticeable
The bassoon responds differently across its registers, causing certain notes to pop out while others thin out, resulting in what is known as "register unevenness." In pieces like Weissenborn No.7, where the same rhythms and motifs repeat, even slight unevenness makes the line sound bumpy and disrupts the musical flow. The key is not to suppress the upper notes, but to keep your center of gravity on the lower notes while aligning your airflow within a half-note bounce. Furthermore, when you shape staccato with air support and unify the tonal "color" through harmonic direction, the unevenness naturally settles.
Concept: Bassoon Register Unevenness Stems from Differences in Note Response
The root cause of register unevenness is that even when you intend to blow with the same intensity, different notes produce different outputs. On the bassoon, upper notes tend to pop out, while lower notes can suddenly sound thin when the core of the airstream narrows. If you try to force uniformity by simply suppressing the upper notes, the rhythmic weight shifts upward, making the rhythm feel unsettled. Instead, by first establishing a plan to "place weight on the lower notes" and "back-calculate to slightly reduce the upper notes," you can even out the sound without disrupting the flow within each beat, resulting in a smoother line.
Feel: Aligning Weight and Air Curve Stabilizes the Line
Within 4/4 time, if you consciously place weight on beats 1 and 3 (especially the lowest notes), the rhythmic skeleton holds even when upper notes pop out, making the music less likely to fall apart. Think of the air as flowing within a half-note bounce, aiming for a state where the line remains unbroken even when articulated by the tongue. When an upper note pops out with a "splat," rather than making the upper note quieter first, check whether the lower notes are sufficiently "grounded" — this makes it easier to bring everything into alignment.
Common Misconception: The More You Suppress Upper Notes, the More Unevenness Increases
When upper notes pop out, the reflex is to suppress them, which tends to stop the air. However, continuing this causes the beat flow to become congested, the lower notes to thin out further, and ultimately the unevenness to increase. The remedy is to work in this order: "place weight on the lower notes," "keep the air curve flowing," and "back-calculate to slightly reduce the upper notes" — before trying to suppress the upper notes. Once the weight is stable, the popping of upper notes tends to stay within a "musically acceptable range."
- Can you maintain weight on beats 1 and 3 in 4/4 time (especially the lower notes) while keeping the upper notes from popping out?
- Is the air flowing within a half-note bounce so that the line stays intact even when articulated by the tongue?
- Are you inadvertently stopping the air by trying to suppress the upper notes, causing the beat flow to become congested?
- Can you handle staccato on easily responsive notes like upper F with air support rather than tongue force?
- Even in repeated motifs, are you unifying the tonal color by being aware of harmonic direction and progression?
- Are you taking breaths at points where the tension naturally settles, without cutting off the sense of direction toward the next measure?
Addressing register unevenness is less about equalizing volume and more about organizing weight and directional sense within each beat. By accepting that upper notes respond more easily and keeping the airflow grounded in the lower notes, the line becomes more stable.
Summary
Rather than trying to eliminate the natural response differences across registers, it is more practical and effective to align the rhythmic weight and airflow on the bassoon to make unevenness "less noticeable." In pieces with frequent repetition like Weissenborn No.7, simply placing weight on beats 1 and 3 (the lower notes) and maintaining airflow within a half-note bounce can make the line smoother. When upper notes pop out, check the support on the lower notes and the rhythmic skeleton before suppressing the top, and back-calculate to reduce. Additionally, shaping staccato with air support and unifying color through harmonic direction helps register unevenness settle naturally within the musical flow.
