Unlike on a western fiddle, the strings are not pressed down onto a fingerboard; exceptional bow control is needed and the finger pressure on the strings is critical.
Both strings are fingered simultaneously, but the direction of pressure on the bow allows one or the other string to be sounded. The resulting tone is close to that of the violin, though more nasal in quality. Vibrato and trills are widely used, and the instrument is capable of great sensitivity and can be hauntingly evocative and soulful.I was moved by this scene and the sound coming from the erhu. But unfortuately, an elbow from a passerby got in the picture.