Use drones and chords to develop the technique of double stopping, e.g. (on the violin):
- Play the first five notes of the G major scale, starting with the third finger on the D string. ‘Drag’ the open string below.
- Practise balancing the bow across both strings throughout.
- A good piece to practise this is Les Bouffons from Arbeau’s Orchesographie in G. Play the melody, dragging the string below, but whenever C natural is played on the A string add a first finger E on the D string (implying a C chord). For the last note add a second finger B to the G string.