Hi Giuseppe, thanks for being part of WindWorks. Really watch the videos closely and be sure you are copying the process. As Rod pointed out, and I totally agree, you need to be transferring your new skills to the trumpet and to observe what is happening. In the search for a beautiful tone, you may begin to manipulate a little and that is OK because you are aware of this manipulation “The Point of Difference”. Keep comparing the sensation of humming, playing leadpipe and playing trumpet. Your aim is to play with the best sound, as easily is possible. Work through the exercises daily firstly focusing on process and then focus on the great sound you want to make. All the best, Greg.