Who said there is only one way of playing on the trumpet ... 1. Following Timofei Dokshizer, play on the mouthpiece alone, starting with long tones (low, medium, high range) and do scales in all keys. Lips do not play the trumpet: use the same position and tension of lips in all registers, and adjust the note pitch by tongue. Practice articulation, dynamics, phrasing. Eventually, you should be able to play everything you are willing to play on the horn, just on the mouthpiece. For mpc practice, you will need two to three hours a day, on and off (practice - rest - practice - rest). You can do the mpc practice even while watching TV. It will not sound beautiful from the beginning, but neither it will be very loud so your neighbors' ears will be spared. Follow the mouthpiece practice by one hour on the horn (again, rest as much as you play). Record your sound either way and listen while resting. You will come refreshed, with a better feel for the horn and regained embouchure. 2. Completely different from #1, use Vizzutti's method shown here: YouTube- Allen Vizzutti Trumpet Clinic 1 of 4 No sound on mouthpiece alone, sound only appears when mouthpiece is attached to the trumpet. You may want to find more materials from Vizzutti's school.