Listen for a crisp, clean tone on each note. If there is a barking or cracking noise, you need to adjust the timing on your flicking, and/or the speed of your airstream, and/or the shape of your embouchure. Experiment!
PRACTICE TIP: It is helpful to practice staccato lines by playing them legato. This helps you feel a connected musical line and the continuous movement of your airstream (both of which should be present no matter how short the articulation).
Prior to playing this etude, practice playing F2 to G2 slowly to establish a smooth connection. If the notes do not connect, or if the G squeaks, make sure your fingers are moving simultaneously, check the size of your half hole, and make sure your air stream flows purposefully between the two notes.
