Car Horn Sound
If you would like a good way to practice this, start with a long tone. Take an easy, full breath and ping the front of the note as though you were hitting a chime. Then simply allow the air in your lungs to empty naturally. Don't artificially sustain the volume by forcing the airstream. Artificial sustaining sounds like someone leaning on a car horn. There's a reason why it is so annoying when someone is leaning on their horn. That's because an artificially sustained sound is NOT pleasing to listen to! When you start to run out of air, simply let it go! This should result in a beautiful, easily produced long tone with a seamless taper at the end. Then use that exact same airstream to play the first phrase of Rochut #2, or any other cantabile phrase for that matter. Sounds kinda nice, right?