Cello Intermediate 29: Introduction to Thumb Position

In this video, we will be looking at thumb position on the cello.

Thumb position is used when we move past 4th position up into the higher regions of the fingerboard. While you can technically use thumb position anywhere on the cello, we mostly rely on it to reach higher pitches. I always encourage cellists to introduce thumb position early so that it feels natural and comfortable long before encountering it in challenging pieces.

Finding your anchor with harmonics

The easiest way to locate thumb position is to find the harmonic that divides the string exactly in half. On the D string and A string, this harmonic sits one octave above the open string, just past 4th position where your 3rd finger would normally reach.

When you first try this, do not press the thumb down into the wood. Simply touch the harmonic lightly to verify you are in the correct place, and then let your thumb rest across the string.

Moving your bow closer to the bridge

Because you are physically cutting the string in half, the sounding length of the string is much shorter. If you keep your bow at its normal 1st position contact point, the tone will sound thin and puny. You must bring your bow noticeably closer to the bridge. Keep the stroke light and resonant rather than forcing heavy downward pressure.

Left hand posture and the C-shape

Even though you are high up on the cello, your foundational left-hand shape should remain familiar:

• The area just below your wrist can rest comfortably along the rim of the cello for balance.
• Keep your large knuckles high and maintain your curved C-shape. Never allow the palm or knuckles to collapse flat against the strings.
• Your thumb moves slightly in front of the fingers rather than tucked underneath them, and your fingers will angle slightly more diagonally across the string.
• When moving across to the D string, bring your elbow and shoulder slightly around to keep your arm weight centred over the playing fingers.

The four essential spacing shapes

Once your thumb is resting across the strings, you can navigate almost any passage by learning four simple spacing patterns:

• Major pattern (tone - tone - semitone): big, big, small (e.g. D, E, F sharp, G).
• Minor pattern (tone - semitone - tone): big, small, big.
• Whole tone pattern (tone - tone -tone): big, big, big.
• Phrygian mode (semitone - tone - tone): small, big, big.

Practising simple tunes

A wonderful way to settle into this register is to play simple melodies that you already know by heart, such as "Mary Had a Little Lamb", entirely within this octave box. By playing tunes you know well, your ear will immediately guide your intonation while your hand adapts to the new balance and position.