Do fine tuners affect violin sound?
The mass that fine tuners add to the tailpiece affect the sound. 2. The shortening of the string afterlength due to add-on fine tuners affect the sound.
How many fine tuners should a violin have?
For beginners I recommend to have four fine tuners, so a fine tuner for every string. Tuning your violin or viola can be difficult in the beginning. When you have four fine tuners you can easily tune every string very precisely.