1. Open Strings: Start by playing the open strings (E, A, D, G) without placing any fingers on the fingerboard. These are the basic notes you can produce.
2. First Finger (1): Place your first finger on the string just above the metal fret (the raised ridge on the fingerboard). This shortens the string and raises the pitch. The note produced is one whole step (two half steps) higher than the open string.
3. Second Finger (2): Place your second finger just above the next metal fret. This further shortens the string, raising the pitch by another whole step. The resulting note is two whole steps higher than the open string.
4. Third Finger (3): Follow the same pattern with your third finger. Placing it just above the next fret raises the pitch by another whole step. The note is now three whole steps higher than the open string.
5. Fourth Finger (4): The fourth finger is used for higher notes. Place it just above the next fret to raise the pitch by another whole step. The resulting note is four whole steps higher than the open string.
By repeating this process with different combinations of fingers on different strings, you can produce various notes on the violin. Each note has its own distinct pitch and音高，音调. Practice and familiarity with the fingerboard will enable you to play any note you desire.
Remember to press the strings down firmly with your fingers to ensure a clear sound. Also, the exact placement of your fingers can slightly affect the intonation and音调，音调 of the notes. Fine-tune your finger positions by listening and adjusting until you achieve the desired pitch.