Practical tool for musicians to learn or optimise breathing and embouchure for playing a wind instrument at the same time- With 4 balls of different weights and a basket with a sealing cork- First, the lightest ball is placed on the vertical part of the ASTRA and then blown into the horizontal part over its own mouthpiece - as far as the generated airflow is sufficient, the ball is brought into a hovering position over the vertical part - now one can move from the lighter to the heavier balls- The basket serves both for storing the balls and as a catch basket when blowing up a ball, if it is put over the vertical part of the ASTRA- The end is glued with cork and fits a standard alto saxophone mouthpiece.- Material: Wood