The purity of intonation when singing depends on two components: the degree of development of musical ear and the level of voice control. If for the second aspect it is enough to turn to a vocal teacher, then the first develops exclusively with the help of independent solfeggio studies.
Instructions
Step 1
Write monophonic dictations. Have someone (a teacher or friend) play you a short, simple melody (8 bars) with a simple rhythm. Determine the scale (major or minor, natural, harmonic or melodic), meter (three quarters, four quarters, six eighths), tempo. It will be nice if you, focusing on the sound "A" of the first octave, can determine the tonality, but not necessarily at first.
Step 2
Write down the dictation. Every 5 minutes, you can repeat the playing of the dictation up to eight to twelve times, depending on the complexity of the dictation. After writing, compare your version with the original. Then sing the dictation "solfeggio", that is, with the names of the notes and timing.
Step 3
Write two-part dictations. When listening for the first time, analyze a melody of the same volume according to the plan of a monophonic dictation, additionally trying to determine the intervals. For repeated plays, write the lower voice first, then the upper one. You need to play the same way: eight to twelve times in five minutes.
Step 4
Sing a two-part dictation, in this way: first the first interval (lower sound, then upper sound), then the second interval (lower, upper). You will hardly be able to sing to the rhythm, but be sure to name the notes.
Step 5
As your hearing develops, write dictations that are more complex in melody and rhythm, add three and four-part ones. Sing three-part dictations according to the two-part principle (chord from bottom to top, then second chord). The four-part chords are sung like this. First chord: bottom, second from top, second from bottom, top. Second chord: bottom, second from top, second from bottom, top. Transpose sounds into an octave that is easy to sing. Do at least half an hour every day.