-Hulem record your voice then listen to it then you know where it's vibrating. -And choose a music wisely. Ket ket yalu bizu curve and kilatse yelelachewin miret. -Before you start sing, always hear the music many times carefully hear each thing each melody. -Then if you are available, have a musician friends. - yezefen mircha for instance Mohamed Ahmed is better from tilahun gesese in case of you. Yiheninm gin you should do it in accuracy.