Left Thumb Flexible Location
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Never squeeze the instrument’s neck with your thumb!
Remember, the instrument’s neck is a neck, not a handle! Depending on the length and shape of your thumb and the thickness of the instrument’s neck, the pin-point location of the thumb varies from person to person. Here is some handy advice:
The thumb serves to support the state of motion created by the actions your fingers perform. Creating different pitches at all regions on the strings requires thumb flexibility and mobility.
Most string players are successful when playing with a loose straight thumb, where the pad of the thumb’s tip segment makes gentle contact with the instrument’s neck.
Focus on finding the thumb placement that works well for you!
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Violin and Viola: In 1st position, your left thumb is placed on the left side of the instrument’s neck and slightly under the neck. The left thumb is placed opposite your index-finger or slightly more towards the center of your hand.

Cello and Bass: The left thumb is placed under the instrument’s neck, opposite your center-finger and varies location in order to increase finger mechanic leverage.

Always practice with the goal of securing a flexible, tactile sensation to your thumb mechanics.
In playing position, the tip of the thumb does not wrap over the fingerboard.
Keeping your thumb muscles relaxed, makes it possible to have increased control of your finger mechanics.
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D Major Home     Instrument Tapes     Finger Mechanics     Finger Numbering     Finger Dexterity     Finger Position

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The Major Seventh     The Perfect Octave     The Complete D Major Scale     Left Thumb Logic     Left Thumb Flexible Location

Knuckle Leverage     D Major Etudes     Arpeggio Patterns     D Major Mastery Checkpoint     Extending the Instrument’s Range

Finger Location Terms     Violin Notes on G     Viola Notes on G     Cello Notes on G     Bass Notes on E     Bass Notes on A

Viola Notes on C     Cello Notes on C     Violin Notes on E     Third Position Principles     Violin Third Position on E

Third Position Measurement Differences     D Major Harmony     Interval Categories     Orchestra Harmony in D Major

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Practice Coins     Violin Technique Builder     Viola Technique Builder     Cello Technique Builder     Bass Technique Builder

Dynamic March Theme and Variations     Bowing Dynamics     Dynamic March Performance Details     Linked Bowing Exercise

Off-Beats Exercise     Neighbor Notes     Complete Dynamic March Composition Score and Parts