Tackling those Walton sixths...
Technical resources & practice strategies to strengthen your left hand

So many young violists are offering the first movement of the Walton Concerto for summer program and college auditions these days, and as a listener I evaluate the player’s ability to convey nuance in the melodies, execute expressive shifts, produce clear, strong tone in highest register of A string, deliver clean fast passagework, present tempo transitions, and play those sixths in tune with beautiful tone. Just as there is a minimum height requirement for youngsters to board certain rides at an amusement park, facility with long distance shifts and sixths should be a prerequisite for playing Walton. That said, the sixths in the first and third movements are challenging for nearly everyone, and there are some practice strategies with which to tackle them.
Before practicing the first movement Walton passage, add to your daily warm-up some sixths in A major on A-D strings, experimenting with new vs. same finger sixths in broken third patterns, parallel scales, and shifting. Make up short exercises which resemble fragments of the passage. If working on a shift, use the Dounis grace-note shifting exercise (Artist’s Technique of Violin Playing, Op. 12) to loosen your left hand.
If having trouble with either intonation or tone quality in this passage, keep revisiting your decisions about fingerings, where to shift and where to change the bow. Consider a mixture of sixths with new fingers (1-2, 2-3, 3-4) as well as with same fingers shifting (1-2 – 1-2, or 2-3 – 2-3). In many instances, same finger sixths will keep your left hand more relaxed and can be done either cleanly in a bow change or portato stroke, or slurred with occasional stylish subtle glides between the notes, a hallmark of British string music from this era.
Keep reinforcing a beautiful aural model by playing only the top voice, with the fingerings you would choose if this were not a double-stop passage, then return to the real fingerings, one voice at a time with the age-old practice technique for double-stops, fingering both notes but sounding only one, then switching to the other. Make sure that you know the lower voice just as well as the top one, and that you can hear the top and bottom voice lines in your head away from the viola, both individually and as double-stops. In all the practice techniques, always remember to keep a light touch in the left hand, and always use the same bowing and bow distribution you will ultimately be doing, so that anything in the left hand which needs to happen cleanly during the bow change will also be practiced in context. Follow up non-vibrato practice for intonation purity with addition of vibrato, and keep this vibrato small enough that the interval is still clearly in tune. Sometimes experimentation with the bow's amount, part, weight, and contact point will help clarify this passage -- make sure you are not "over-bowing" with too much or too fast a bow, especially during shifts.
Try the passage in many different practice tempi with various practice strategies:
1)very, very slowly with total awareness of the sixteenth-note rhythmic subdivision to perfectly time shifts and finger placements; do this with soft tremolo bowing to help lighten and time the left hand, gradually increasing tempo
2)too fast a tempo on purpose, to insure that your touch is light and your movements both unhesitating and accurate; do this in good rhythm with very short, firm placed spiccato stroke, using the silence between the notes to help left hand learn its placement in faster tempo. Follow this up with the real bowing, but with the bow stopping between the notes. Then gradually slow the tempo back to reality and reduce the bow’s stopping between notes until slurs are restored.
While the above practice strategies for this passage can help the player improve command of sixths, keep in mind that much like any athletic endeavor, experience with a consistent daily warm-up which addresses various double-stops is the path to develop the left hand’s accuracy, balance, strength and suppleness required for passages like this one as well as others in our 20th century repertoire.
