What is the positioning of the thumb in the French hand placement technique?

In the French hand placement technique for playing brass instruments, particularly the trumpet, the positioning of the thumb plays a crucial role in maintaining proper technique and achieving a good sound. The correct answer emphasizes that the thumb forms a 90-degree angle with the hand. This positioning allows the player to maintain adequate control over the instrument while ensuring that the fingers are appropriately aligned for ease of operation of the valves.

When the thumb is at a 90-degree angle, it creates a stable base, allowing the other fingers to operate the valves effectively without straining the hand. This setup is essential for achieving a comfortable grip and reducing the risk of tension or injury during play. Proper thumb placement also contributes to the overall posture of the musician, enhancing their ability to play with fluidity and efficiency.

In contrast, other positioning choices would lead to either discomfort or limited range of motion in the hands, making it harder to perform correctly and consistently. Understanding this technique is important for musicians to develop good habits from the outset.