Jugalbandi (literally "twin-tied") is one of the most thrilling formats in South Asian classical performance. Two artists — usually of comparable stature, sometimes from different traditions — share the stage as equal soloists, taking turns to develop the raag, responding to each other's phrases, and culminating in interlocked taans and tihais.
The format demands extreme musical empathy. Each artist must know what the other will do before they do it. Phrases passed back and forth must complete each other rhythmically and tonally. The dialogue can be cooperative (each building on the other's idea) or playfully competitive (each trying to surprise the other within the raag's rules).
Common pairings include sitar-sarod, sitar-flute, violin-flute, tabla-pakhawaj, and vocal-instrumental (a singer with a sitarist or sarodi). The most famous jugalbandis of the 20th century were Ashraf Sharif Khan with Sajid Hussain (sitar-sarod), and Ashraf Sharif Khan with Akmal Qadri (sitar-shehnai).
A jugalbandi is structurally similar to a solo performance — alap, jor, jhala, gat — but with the development split between the two artists. The tabla player accompanies both. The audience hears not just one artist's reading of the raag, but two, in conversation. When the dialogue truly lands, it is one of the most exhilarating experiences in classical music.