His orchestra is small&colon; oboes; strings; and basso continuo of harpsichord, violoncello, violone, and bassoon. Continuo are violoncello, double bass, bassoon, and organ. A harpsichord and violoncello play the continuo. He also learnt oboe, bassoon, violin, and violoncello and other instruments. Williams proposed a violoncello piccolo or a five-stringed cello as alternative possibilities in 2003. Basso continuo in "recitativi secchi" is made up of cembalo and violoncello. The solo violin part of Wilhelmj's arrangement is sometimes played on the counter-tenor violoncello. The direct ancestor to the violoncello was the bass violin. In this school Hajibeyov learned to play the violin, the violoncello and the brass instrument. The instrument is sometimes also called a guitar violoncello. In 1990, he was posthumously awarded the "Chevalier du violoncello" by the Janzer Foundation. He is the fourth person to hold the Piatigorsky Chair in Violoncello. It appears to have been similar to a five-string violoncello . Abaco wrote nearly 40 cello sonatas, the "11 Capricci for Violoncello Solo", and other works. The USC established the "Piatigorsky Chair of Violoncello" in 1974 to honor Piatigorsky.