What does the thumb-tuck technique involve?

The thumb-tuck technique involves tucking the thumb under the middle or ring fingers. This technique is often used in the context of playing mallet instruments, such as xylophones or marimbas, to achieve better control and a more relaxed grip. When the thumb is tucked beneath the fingers, it allows for increased stability and dexterity while playing, which is essential for performing intricate patterns or faster passages. This grip also minimizes tension in the hand and wrist, contributing to a more fluid playing style and better sound production.

The other options suggest different hand positions or techniques that do not provide the same level of control or efficiency while playing. For instance, positioning the thumb outside the fingers may lead to a less secure grip, and using only the index finger to hold the mallet limits the power and range of motion. Crossing the mallets may assist with certain rhythmic patterns but does not relate directly to the thumb-tuck technique. Therefore, tucking the thumb under the middle or ring fingers is essential for developing a proper and effective mallet grip.