To master overtone series control, it is important to objectively evaluate your embouchure and lower lip position during daily practice. Reed squeaks are actually a phenomenon where an unintended note from the overtone series sounds. For example, when you intend to play a D but the third overtone comes out instead. This occurs because the lower lip is not positioned correctly for that particular overtone. Each overtone has an appropriate lower lip position, and when that position shifts, reed squeaks occur. Conversely, if you can freely control the overtones, you will no longer have to worry about reed squeaks. Reed squeaks are not solely an overtone issue—finger positioning also plays a role. If the tone holes are not properly covered, this can also cause reed squeaks. However, if you have reached a certain level of proficiency and are still troubled by reed squeaks, it is likely that your lower lip is in an incorrect position. Go through the following checkpoints one by one and evaluate whether your overtone control is adequate.

• Do you understand the characteristic of producing only odd-numbered overtones and grasp the structure of the overtone series?
• Do you understand that the register key changes pitch by an interval of a twelfth, and recognize that different overtones can be produced with the same fingering?
• Do you understand that reed squeaks are a phenomenon where an unintended note from the overtone series sounds?
• Do you understand that the lower lip position determines the overtone, and are you conscious of the correct position?
• Have you practiced producing overtones with long tones and developed a feel for the overtones?
• Can you produce the first, third, fifth, seventh, and ninth overtones using the same fingering?
• Are you able to move just the lower lip position flexibly without exaggerated embouchure movement?
• Do you understand that when a reed squeak occurs, it can be resolved by adjusting the lower lip position?
• Do you understand that finger positioning can also cause reed squeaks, and are you covering the tone holes properly?
• Are you continuously checking and improving your overtone series control in daily practice?

Practical Steps for Controlling the Overtone Series

To develop overtone series control, a step-by-step approach is most effective. First, understand the mechanism of overtones, then practice producing overtones with long tones, and finally develop the ability to control overtones by adjusting the lower lip position. By systematically working through this process, you can reliably master overtone series control. In particular, practicing the production of different overtones with the same fingering is extremely effective for developing a feel for overtones. Practicing overtone production with long tones is a fundamental exercise that many players have experienced, and it serves as an important first step toward understanding overtone series control. Through this practice, you can gradually develop the ability to produce overtones from the first to the third, fifth, seventh, and ninth overtones.

1. Understand the mechanism of overtones (odd-numbered overtones only, the twelfth interval, the role of the register key)
2. Practice producing overtones with long tones (from the first overtone to the third, fifth, seventh, and ninth overtones)
3. Practice producing different overtones with the same fingering (using the C fingering, produce the first, third, fifth, and seventh overtones)
4. Practice controlling overtones while being conscious of the lower lip position
5. Practice resolving reed squeaks by adjusting the lower lip position when they occur
6. Check your finger positioning and ensure you are properly covering the tone holes
7. Develop the ability to move just the lower lip position flexibly without exaggerated embouchure movement
8. Continuously check and improve your overtone series control in daily practice

Summary

Controlling the overtone series is extremely important for achieving expressive playing that takes full advantage of the wide range. The clarinet has the unique characteristic of producing only odd-numbered overtones, and the register key changes pitch by an interval of a twelfth, enabling its wide range. In overtone series control, the lower lip position is the key. Each overtone has an appropriate lower lip position, and by being able to control this freely, you can prevent reed squeaks. While it is important not to move the embouchure exaggeratedly, the lower lip position must be moved flexibly. Additionally, since finger positioning can also cause reed squeaks, it is important to simultaneously check that the tone holes are being properly covered. By continuing to practice producing overtones with long tones and practicing different overtones with the same fingering in your daily practice, you can reliably master overtone series control. Once you can freely control the overtone series, you will no longer have to worry about reed squeaks and will be able to perform with stability. Please use the checkpoints introduced in this article as a reference to review your overtone control and aim for stable playing free of reed squeaks.