All violinists yearn for a smooth, clear tone. Beginners often have a hard time producing a nice, clean tone because there are so many factors to be thinking through as a beginner. The beginner has to constantly think about feet positioning, left arm posture, right bow arm posture, left wrist out, straight bows, correct bow angle as to play on only one string, and so on! The beginner can easily get frustrated and daunted by all of slight muscle movements that contribute to making a nice, clear sound! I found a really nice article that pin-points 6 ways to improve the detache (smooth) bow strokes! I hope that you find it helpful in your practice! Click HERE to read the article.