Well, I've heard sound would faint in bowed strings instruments if note played is too long, and player runs out of bow. Is this true? and at which tempo would this occur?
1 Answer
It depends on the dynamic you are playing in, but you can maintain a good tone at a slow pace with practice. Louder volumes require more bow and limits the duration you can hold one bow stroke.
Practicing playing from frog to tip while keeping a steady count teaches your arm how fast it needs to go to maintain the bow for the duration required.
As commented by Todd, if you end up with a duration too long for you, changing the bow discretely on a beat is an acceptable technique.
I'm sure there are players that can hold a whole note at Grave without loss of tone.