I'm sure we all appreciate the sound of a singing violin and its grip on emotions.

ive come close to shedding tears when i practice, but have broken many bow hairs in the process.

When you're an hour or so into practice and your instrument & ligaments are warned up and together they begin to sing (loudly)

1) playing speed increases (left hand articulation and bow strokes turn into bow darts)

2) overtones take over (extra vibrato on higher notes)

3) hearing yourself whimper (while your throat chokes up) 

Here is a good read.

http://www.reddesertviolin.com.....n-playing/

share more good short articles on fiddling!