Producing sound with your voice is just half the battle when it comes to singing. The rest comes from knowing the fundamentals of music and a skill called ear training. It’s a musical discipline that allows you to recognize intervals, situate them in the material you’re singing and hear them in your head before you sing. Having a good ear is your best bet to make sure you’re always singing on key and hitting the right notes. Ear training goes hand-in-hand with music theory, and you’d normally learn both at once if you study music in a traditional setting. To get started, fundamentals like major and minor scales, chords, progressions and rhythms should be on your list.