Interview by Laurinel Owen
The Strad, July 2006 Vol. 117 No. 1395 page 35
We’re always told that keeping the bow parallel to the bridge makes the best sound, but it’s actually more complex, says a leading European cellist
Many years ago I realized that the traditional method of teaching sound production is limited to a scientific axiom: keep your bow in a straight line parallel to the bridge. I became intrigued by the credibility of this statement as well as by the fact that we all ‘know’ that the fundamentals of shaping dynamics are bow speed and pressure, and the placement of the bow on the string – but this last aspect is not entirely clear.
For instance, if the music calls for a note to be played pianissimo, I position my beautifully straight bow at the fingerboard. Let us assume that this note is followed by a rest, and that next note is forte. I pick up the bow and play near the bridge. All is well. However, what happens when I deviate from the 90-degree angle? What is the possible range of deviation (bow angles)? Is there a connection between movement and deviation? Is there a difference between positioning the bow at a 90-degree angle and pushing or pulling the bow at 90 degrees?
Slow motion photography of a vibrating string reveals that its motion is not back and forth, as it would appear to our unaided eyes. Instead, it moves rapidly between the bridge and the nut (or your finger) in complicated irregular vibration patterns that include, as partial vibrations, the whole harmonic spectrum. So when a bow slips down towards the bridge, it is moving in the same direction as the vibrations, which stops the string from freely vibrating and chokes the sound. Read more…